Okay, here's where you can say "I told you so"!
I bought the Quantum mainly because I was more familiar with Prism's presence, and the Nighthawk was fairly new. That was over a month ago. Two weeks ago I bought a Nighthawk when I saw one sitting in my local shop, and I am loving it! It flies nice in lighter wind - more so than the Quantum in my opinion. I also like the way it feels at the end of the lines, especially for the tricks that I know and the ones that I am learning. I'm glad I bought the Quantum first though, because I think the oversteer on the Nighthawk would have hard to deal with right off the start. The Quantum is easy to "drive" around the window - like a Cadillac as opposed to the nimble feel of the Nighthawk, which requires more attention from me when I'm bailing out of tricks and just plain manuevering around.
ikky - the winds here are up and down, we get pretty much everything. The two parks that flyers frequent out here are on bodies of water though, so a steady wind can be had when it blows from the right direction. I also picked up a Flashlight for light winds, but haven't flown it much as the Nighthawk can stay in the air with just a little bit of wind and the winds have been there the times I've gone out.
I'm looking at a Magnum next - I really like the smooth, almost floaty feel the Nighthawk has and I'm hoping the Magnum will feel the same. Damn bug!