I got some of my stuff at TE and some at trisports. Trisports often has coupons online that you can use.

Personally I like having a bra top that dries quickly also. I found that the cheaper tri tops were not as supportive as I'd like for a long run.

If you're doing a sprint tri, you're not in the water that long and if the water is a little cold, it's not such a big deal to not have a wetsuit. I don't bother with mine for a sprint.

If you decide to get a wetsuit, I got mine at REI using a 20% off coupon. I picked REI because if it didn't fit, I could return hassle free.

Veronica