nbgrom

So I've decided to buy a new stumpjumper. Before I buy, are there any major differences between the 05 and 06 that would make the extra money for the 06 worthwhile, or should I stick with the 05 closeout prices? Also, I am 5'8" and 140 lbs (and gaining).
I was thinking 18" frame, is there any reason to stick with the smaller 17"?

I know that I should get to know the bike before making any big changes, but I dive into everything I am interested in, so what initial upgrades should I think about for weight and performance? (besides lizard skin and computer)