The Vibe 50 isn't out yet, I believe JR said December as release date.
I've had a raptor 50, I currently fly a R90, Airskipper 90 and a Vibe 90. I have to say, you can't compare raptors with JR helicopters. The first thing is the amazing quality of JR, everything fits extremely well. The helis I fly, do fly so much better than the R90 and the R50 (a shame I havent flown a JR 50 yet). It's like a train on a rail, and that's really how I can describe it.
If you are looking for a very good helicopter, for all round and 3D, I would definitely recommend any newer JR heli. If you are a very beginner, the R50 will be good for now I think.
Hope this helps,