Be sure to check out the
Everything You Need To Know About The Vibe thread, it has a lot of information about the differences in the different years.
The 03 instrument cluster is all red, I prefer the red and white instrument cluster in the 04+
I also prefer the look fo the 03/04 recessed grill, but others prefer the flush grill in the 05-08s, and that's fine.
I've never driven an 05+ electronic throttle, so can't compare
Tire pressure monitoring systems seem to be a problem on any vehicle that has them.
Probably cost more for the name, but if you find a good deal, be open to a Toyota Matrix. Almost all the same car as a Vibe
Welcome to genvibe, good luck on the decision and search