Okay, here'z the deal. I posted a thread here not long ago about converting an old beater into a fixie via. suicide hub. I also got into a crazy bad accident in June that seriously %(^&#! up my knee and the lube/glue inside of it, so at this point in time I'm finally coming to a point where I can say, "yeah, my knee feels fine". I have an unexplananable desire to ride fixie, and I'm destined to get a new bike on September 15th. The trouble is, I'm torn between getting the $1200 Trek 1500, or a $700 Specialized fixie. Problem is, I've read little tidbits and snags hear and there that say fixies are really hard on your knees due to...well cuz there fixies i guess. Anyone have any input, solutions, suggestions?