Over the last two weeks, I picked up the ROTF Scout Class Skystalker and Voyager Class Mindwipe, and I love these two. I'd sworn I wasn't going to get any non-film ROTF toys, but these are extremely cool and worth a look. I could have done without all the Cybertronian tattoos on Mindwipe, but overall, both have really nice transformations, seem pretty solid, and interact well with each other in vehicle mode.
I hear there's also some undocumented way to have them "combine" in robot modes, but I have yet to see a photo of this so I can try it myself. Anybody have any links?