These are a pretty good tire for the price. Even though they spec them as 26x1.5, they're actually more like 1.35-1.40" wide.
http://www.performancebike.com/shop/...tegory_id=5425
I've also used the Perf 1.25s as linked by Ronzorini. They're OK too, but I have few miles on my 1.25s so can't recommend them as strongly as the 1.5s, which I have ~5,000 miles on a pair.