Also, if you think that you might not have this bike for a long time - if it would be first on the chopping block when you're strapped for cash or whatever - I think that the cheaper steel bikes are the way to go. "Barely new, only ridden on a velodrome" will get you what you paid for it. The alu stuff tends to not do quite so well at re-sale. Exception being the Pista Concept, which is this year's hot frame.