I really liked the F4 wave overall as well. Something didn't seem quite right with the Thing for me either, so I've still got the earlier one on display (or in front of the new one). It did allow me to pack away the movie versions of Sue and Reed, and its nice to have an all comic lineup now. Like Scott mentioned, the only thing missing is perhaps a little more in the way of paint apps, but otherwise its a pretty nice lineup. Doom is one of my favorite figures of the line, ToyBiz or Hasbro.
You know, as I was rearranging things in our office/collection room this week, I never would have thought I'd have had nearly an entire bookcase dedicated to Marvel figures though when I started out with this line. I really like them, but I guess I didn't think initially I'd go so nuts with them. As things are getting fuller in here, I'm already giving thought to who is "essential" and I would like to leave on display if I had to pack some away. It would be some tough choices as to who are the essential Marvel characters to display.