Argentine friends of ours prefer entraña or bife de costilla. After some years, I’m appreciating those cuts more, but still gravitate towards your choices, @Bombonera .
I’m sure you sometimes start your meal with an empanada or a provoleta? And of course you’ve come to love choripan by now. My advice is to spend your last meals having what you know you love, rather than branching out at this late date. Be adventurous early in your next trip!
I've yet to have a memorable experience eating asado in a restaurant in Argentina. Most of it has been poor quality and overpriced.
That’s sad UK Man
Not really....to me, asado is all about making it yourself for friends or family. 
Well you MUST have a provoleta before leaving Argentina, @Bombonera ! Mollejas are perhaps an acquired taste, but everyone loves a provoleta. Best with ham & tomatoes on top, in addition to the oregano.
Please share the name of your San Telmo favorite place for choripan?
, but everyone loves a provoleta.
Not me....I hate it.
I’ll put it on my list, thanks!
I can't remember the last time we ate at a parrilla. This could be because we've been very disappointed with the beef, being as tough as old boots.
If we do eat out, I'll usually go for a lomito because they can't screw that up and definitely provoleta, choripan and mollejas.
However, eating out is now a luxury we can't afford and, as UK Man says, doing it yourself is a lot more fun.
I suspect that the more -er- interesting bits are there as a dare for the most foolhardy. A bit like the old days in England when people would pile out of a pub at closing time and crowd into an Indian restaurant and see who could eat the hottest Vindaloo
I can't remember the last time we ate at a parrilla. This could be because we've been very disappointed with the beef, being as tough as old boots.
If we do eat out, I'll usually go for a lomito because they can't screw that up and definitely provoleta, choripan and mollejas.
However, eating out is now a luxury we can't afford and, as UK Man says, doing it yourself is a lot more fun.
I'm trying to remember the last time I ate out at a parrilla and I can't. We probably gave up going to them because the quality of the meat was poor for the prices they'd charge. To be honest the quality of the beef from the butchers to make your own asado isn't much better. Pork quality is much more consistent.
I am a sucker for mollejas (sweetbreads) with a dash of lemon. Of course they are one of the fattest meat entrées and the most expensive one. Not many place serve it because of this.
As for meat cuts, I usually go for entraña or lomo. Tbh, between a bife and a lomo, the taste isn't much different. The only difference is that a bife you can also do it at home "a la plancha", whereas a lomo is a thick cut and can't be cooked on the stove (you'd have to use the oven). Entraña has a unique taste.
If you eat pork, pecheto de cerdo is my fave. As Splinter said, eating a parrilla out is a hit or miss. Sometimes I had great a meal in a place, and the next time was a disappointment.
In Capital, Parrilla Peña is pretty popular among locals and tourists alike, but I found it not impressive. Decent, but not somewhere where I would bring a friend visiting.
I have had the same reaction to Parilla Peña, serafina . It doesn’t hold a candle to places like Don Julio, unsurpassed for ambience, delicious and well-prepared beef, and a good wine list. Or even Las Nazarenas (microcentro), which lacks ambience but has good cuts of meat and an extensive wine list. Parilla Peña is crowded, service is spotty, and even jugoso translates into “tough as a leather handbag.”
Rice , Las Nazarenas closed during the pandemics and never reopened.
Las Nazarenas Closed??? Say it’s not so! That is a real shame.
@Bombonera , a really nice restaurant in microcentro is The New Brighton, at Sarmiento 645. Not a parrilla, but they do fabulous meat. Also grilled salmon. A very relaxing place with exquisite service.
There is also El Palacio Español, also not a parrilla but a nice restaurant with Spanish cooking and an interesting history.
You will really like the New Brighton, and it will be a great place to end your trip. You’ll be planning your return trip to Argentina before your last bite.
El Club del Progreso is a famous place. They have two sitting areas: a more low key one downstairs (covered patio) and a fancier one upstair.
I remember it being expensive but I see that on their website they are advertising a "tenedor libre" offer for barbecue meat, although I doubt that it could really cost just 2900 ARS.
I didn't have meat when I was there, but it looked yummy!
If you want quality asado I'll sort you out. No charge just bring the booze!! 
It’s a fair offer!
A Jura malt will do... 
I'll take up on your offer and I will throw in some kit kats and dog treats.
Ah, the ante is upped in this bidding war!
