Wow... that's awesome! I wish we had a rewards program like that! We used to with a vendor, but it has since gone away.. I did get a Mac Mini a couple years ago out of it, though
Anyway, my recommendation is to defintiely buy the one you have the best riding impression of. I rode quite a few bikes both times I have purchased this year, and have been very pleased with both purchases. When I bought my Specialized Hardrock I had my heart set on a Gary Fisher. When I bought my Trek FX I had my heart set on a Redline 9-2-5.
Heck, I even enjoyed the FX I bought more than the bike I loved so much on paper that it was competing with - the Bianchi Volpe. I spent quite a bit of time over two weekends comparing those two and, get this, the Redline Monocog 29er. I'm still kind of kicking myself for not getting the monocog because it fit me so well, and was sooo much fun to ride.
I also rode a Pilot but feared for the carbon underneath my butt. However, through this forum I've learned that is kind of silly, and the LBS assured me it was as well. They were even ready to put a written guarantee from their shop for the fork on a 7.5 or 7.6 FX, but I didn't want to have to replace the wheelset right out of the gate. The pilot was, unfortunately, out of my price range.
Anyway, I say good luck. I've always thought I had my mind made up, then rode something and found something I liked even better.