Kokatat quoted me $100 to put a zipper in my Tropos. Would still save you $250.
I love my bibs, along with the tropos drytop they are virtually a dry suit.
The Tropos material allows the temp in more than Gore-Tex, so you have to think about layering. I have a union suit, and I'm toasty. I've been using them for two full seasons and don't have a problem yet.
You ARE a soul, you HAVE a body.