I might ask you to look into a Wario for me, Larry. If there is one with a clean paint job and nice packaging, I would be interested. Thinking about it, I'm not really all that interested in Waluigi, to be honest. The only reason would be to pair him with Wario, but if I never happen to find one, I won't really be too broken up about it.
It might sound weird, but I actually prefer the 2.5" figures to the 4". Even though they are much more functionally limited, I feel like I get more bang for my buck when I can buy four smaller articulated figures for $22 bucks rather than two larger ones for $24. That being said, I'm not planning on purchasing all of the 2.5" figures, only the ones that I think look cool. In particular, these happen to be the larger 2.5" figures, like Ganondorf and Donkey Kong, but I also quite like Diddy. I picked up Link to go along with Ganondorf because hey, what's five bucks, right?
However, I did splurge on the 6" DK and Bowser figures. Picked up DK off Amazon.com for $15.99 (plus free shipping for the whole order). Unfortunately, I had to pay more than retail for Bowser, but I was quite lucky in that I won an eBay auction for $20.99 -- the starting bid! That one also cost $7 to ship, though. Still, only about $5 more than MSRP. I can live with that. Don't really have much interest in any of the current or announced 6" figures, either. I'm happy just picking and choosing the figures I like.