as far as year goes for the Raptor, the newer the better.
Im not sure what your riding style consists of but the raptor is about 40 lbs heavier, and has a smaller gas tank then the Banshee. 3.2g Banshee 2.9 gallon Raptor.
So if your riding long distance i would look into a bigger tank possibly.
Stock hp of the Raptor seems to be consistant low 40s, lotta guys saying with a good pipes and intake you can get near 50. obviously on this site you know what a banshee is capable of...
I have heard the efi can be a nightmare if things start to shit the bucket.
But good luck if you get one. as for my 2 cents i will never own a 4 poke. I have ridden both quad and dirtbikes both 250f, 450f, 450 quads and 700 quads and im sticking to the smokers.
much cheaper to operate, in my opinion much funner to ride. but then again i thought quads were retard chariots until i hopped on a banshee a few weeks ago, closest a quad will ever get to
a dirtbike in my opinion.