Morris the Knife. Hovers all day long and pretty easy. Will perform any other 3D maneuver well also very nicely. It is an overall good flying 3D profile for the money. That would be my first choice.
If you are looking for something bigger and none profile, the Graupner Showflyer might be a good choice. It's a 60 size plane and also does everything you ask for. Flies very gentle and hovers great. Best inverted flat spins. It's the plane in my avatar.
Don't go with the Flip if you have never flown a 3D bird before. It's a little wilder then the other in it's class out there. I love it however, but it's not a 3D trainer.