Ok, some more tire testing tonight--
Kevin K ran both pro compound and D compound X patterns. The D compound tires worked almost as well as the pro tire, but the pro tire had more steering. That being said, when the traction comes up, you might actually want to be on D tires.

For those wanting a mounted tire, the D compound premount Xpatterns may be what you are looking for.

Also, the integy C22 pro street max was doing similar lap times to the X patterns, and will likely be good as traction comes up. I had them mounted on 26mm rims, so they are stretched a bit. The price is right...

http://www.integy.com/st_main.html?p_catid=4