ive flown the 65 vyper, and if the 46 flies anything like it you will LOVE it. it 3d's so easily, but you can setup low rates inorder to have it fly just like a pattern plane, it really is a fantastic plane.
i had an addiction, and i didnt like it all that much. it will hover....and thats about it. if you want to advance your flying skills (and you can already hover), id recommend the 42 slick since you already have the gear (i dunno if that is the correct gear, just assuming you did your homework and checked
). i know so many people that love theirs and it is a very very versatile plane, you wont get bored with it. i have a feeling you want to improve your precision skills but still be able to huck, and if thats so then the vyper is one helluva plane.
get the 42 slick since you have the gear, fly the crap out of it, and when you have the funds go with the 65 vyper if you want to do a bigger electric, or do a 72 extra 330sc if you want to do gas