Out of the Hasbro line I've only gotten Leader Sentinel, Deluxe Skids and Mudflap, Voyager Megs and Leader Ironhide. I got Takara's Jetwing Prime also.
Ironhide is going to be my first repaint project after I get some practice on lesser formers. Despite his small size Megatron is a really nice figure. I personally like the Twins design (but the characters still suck). Sentinel is clearly missing paint apps when you compare the finished product to the Hasbro publicity shots. Jetwing Prime is without a doubt the best thing in the DOTM line but he doesn't really count as he is a Japanese exclusive remold of a ROTF figure.
I'm looking for Sideswipe to practice my repainting on, I want a Deluxe Topspin and Voyager Shockwave, they look awesome. But thats all from the currently seen line of toys I want to pick up. And I will reserve judgement on the Soundwave's till I see them cause for all we know they might be crap.