The Kendas are decent looking tread. There are some K761's on ebay right now for like $53 shipped. One seller has a single for $32 shipped, but it's either a crappy picture or the tire is really dried out.
I just ordered this one:
http://cgi.ebay.com/ebaymotors/ws/eB...m=260599451847 for $16 shipped since my front has a split in the side with the tube bulging out. I figure for $16 I can't go wrong for a tire to do test runs on and decide later if I like it. The tread doesn't look too aggressive.