Here's my thought:
I just read through your rush thread from last year... You definately had a bad situation on your final night of rush.
I say if you're going to regret this forever, go for it. But you may want to be a little more aggressive this year--try to get recs for at least the groups you liked last year. Speak up for yourself if you get in a bad situation. However, you need to be prepared for the worst.
At some schools rushing as a junior is going to be very, very difficult.
Please PM me... I have a friend at school that this happened to... I'd love to chat about it (I'm also membership chair for my sorority, so I know my stuff).