Try
these: Very good for the money. I owned a pair.
However. If I had to do it again? I'd get a decent set of 700c (and a long-reach front brake); that's the kind of wheel your next frame will take, and there are so many more tire choices available. I got 27" for aesthetic reasons. But now that I cracked the frame that takes 27" wheels, that wheelset will probably just sit around my basement.