monday nite in south beach
Haven't tried it yet, but the Clinton is supposed to have an interesting new restaurant called 8 1/2:
Also new and untested (by me) is a place called Fifty on Ocean south of 5th
Don't know what's up with all the new numbered names for restaurants.
Sorry I can't speak from personal experience on either of these. You can probably find both of them reviewed in Miami New Times or in the Miami Herald's restaurant reviews:
My first pick would be Talula (on Collins around 23rd St.) but unfortunately they are closed on Mondays.
I like Mark's (in the Nash Hotel on Collins and 11th) but it depends on your idea of pretentious. It is somewhat highbrow food and quite pricey but I think it's well done and they do a nice job of incorporating local ingredients. Because it's sort of out-of-the-way (inside the hotel in a downstairs space) it tends not to be as touristy as other South Beach places.
Somewhat off the radar screen these days, but I still think it's good, is Yuca (on Lincoln Road toward the east end). This was one of the original "Floribbean" or "Mango Gang" restaurants and I still think they do a great job on upscale nuevo latino food. The guava BBQ ribs are fantastic.