RE: Burris Scopes
I have a Burris signature 2-8x40. It has good optics, clear and lets in a lot of light, but I quit using it because I hate the Posi-lok. I think it is a piece of junk. It is a pain it the butt to sight in, you tighten the posi-lok and it moves the cross hairs. From now on I will by the Elite 4200s.
As for the powers you are looking at, I think both are too high. I can shoot a deer at 300 yard with a 4x, going that high in magnification reduces the amount of light the scope lets in and adds weight. I personally would go with an Elite 4200 in 2.5-10x40.