Of course it matters where you go to undergrad. But only insofar as comparing your GPA. A 3.5 at UCBerekely is going to get way more love than a 3.5 from University of San Diego (UCSD though is a very good school). Your major also matters (3.5 in biochem vs 3.5 in sports medecine). So go to the school where you will be most happy. But really, if you get into a more competitive school for undergrad, WHY WOULD YOU NOT GO?!?! It's ******ed to go for the "easy college" way because then when you hit real life or grad school you'll realize you'r a ******. Whereas if you go to a competitive undergrad, you can still party and have tons of fun, just get decent grades and you'll have a good chance at any career you want.