I just completed my second tri, and I am considering buying a wetsuit. Ok, not considering, I am buying a wetsuit. I just want to know if anyone has any tips on whether I should buy a sleeveless or long-sleeved wetsuit? Is there a huge benefit to one or the other? I don't plan on doing a bunch of cold water swims, but maybe I need the long sleeves?

To clarify why I need the wetsuit, I am competing in one more tri this season (i am also focusing on marathons, so I'm stretched a little thin) and then next summer I'll do hopefully three in training and preparation for a half Ironman in 2011 (in Hawaii!!). I am really confused about the whole thing and concerned that I will spend a lot of money on the wrong thing.

Thanks in advance for any tips!