I'd love a Weld vs. Spitzer race, both candidates would be great. It would make up for CT not having a competitive race next year.
Actually Weld v. Spitzer wouldn't be close at all. Polls show Spitzer winning by about 45% now (although alot of that's due to no name recognition for Weld). Nevertheless I wouldn't think Weld could get within 20% by Nov. 2006.
In other years Weld might be a somewhat decent candidate with a shot, but the NY GOP is so badly damaged right now, this won't be close. Weld will make it closer than others will, but its still going to be a very solid Spitzer win (around 20 points or so)