spring rush 2014

There's a formal rush that every fraternity participates in, however it's on a smaller scale than the fall's because there are less people going through the system.

all of 'em. I rushed last spring. It has both pros and cons. I liked it over fall because you can talk to the brothers easier in rush due to not having as many rushees there. Plus (well, last year) there's more time pre-rush to go to parties and stuff to meet the guys. Honestly I think each fraternity is good in it's own way, I don't have a problem with any as a whole. try to meet as many brothers from as many fraternities as you can. some people just fit mid/lower tiers. I tried to stop by a couple of each tier. the ones you named are good fraternities so I'd definitely check them out.
don't let anyone dissuade you from the group of guys you like/fit in the best with, even if they have certain reputations.