I picked the 7.3 for my most recent bike because it's lighter and because the components feel much better over the 7.2 that i bought a couple of years back.

another reason why the 7.3 might make more sense is because you can find it for way below msrp if you go to the right bike shops. the 2011 7.3 is $679 MSRP - I paid less than $550 for mine, brand spanking new. the 7.2 is in the upper $500s (i havent checked) so for almost the same price, you get a "better bike" - better components, lighter frame, etc. i will say that either the 7.2 or 7.3 is an awesome ride. you'd be happy with either one

i think you're going to become addicted when you ride one of these things...