If you search, I posted about those Nashbar rims a couple weeks back and got replies that they were fine. I doubt you'll find anything cheaper. I was told they are "very wide" by a few people but I don't know what that means exactly. In the end I chose to spend $35/rim and buy polished Sun CR-18s instead.

You should be able to run 700C rims on nearly any bike that took 27s with the caveat that you might have to change out brakes.

Karl