Depends what you are looking for but I would say telluride hands down. Telluride has the best views anywhere and some of the most gnarly, steep, and fun terrain. A 5-10 min hike off of prospect bowl lift gets you to steep chutes, open faces, cliffs, trees...basically everything you could want. The groomers in telluride are also epic, very open, long and steep with great views. In peak season telluride has NO LINES. You will wait forever in line in breck, but you will get a ton more vertical at telluride on better terrain. Also while Brecks park is obviously bigger and better, tellurides park is still pretty damn good and you will not have to wait in line. You'll basically have it to yourself.
I would recommend staying in the town of telluride and not the mountain village. Town is super cool. Filled with lots of ganja lovers and dirty hippies but unfortunately has been been getting more stuffy as a lot of really rich people have been moving in. Still plenty of party to be had but breck might have a younger night life crowd