Doing the MS 150 on a fixie sounds pretty bold! But then again you fixed gear guys have always been a different bunch.
I ride a lot, since I have worked at a bike shop part time over the last few years. I have a custom titanium hardtail cross-country mountain bike with some pretty nice components, and I have a Specialized Big Hit III downhill bike for hitting the slopes and jumping off big stuff, and I have a Trek 2300 carbon road bike with Ultegra components. And I have a few crappier mountain bikes hanging about for other people to borrow etc.
As an aside, is this the place for cycling talk, I mean they don't have any motors? [shrug]