What is your optics budget? Glass is the one place I always push people to max out their budget, you almost always get what you pay for, once you've looked through a Nightforce or any other high end glass you'll have a hard time looking through a Bushnell again. Plus, if you spend the money for quality you can always keep the glass for your next rifle if you sell the one you've been using it on.
A great option for glass is Sightron S-Tac or SIII series, great glass and turrets for around $1000. I buy mine through Jerry at Mystic precision, side by side with my Nightforce scopes the image quality is hard to tell the difference and they're half the price.
That being said, if you don't plan to shoot beyond 300 yards then a cheaper scope would serve you well, the difference becomes more noticeable as you extend the range, at 1000 yards I can clearly see my targets with my quality optics but through the cheap stuff it's just a blurry mess.
As M14medic said Redfield are Leupold so lifetime no worries warranty, you don't even need to keep your receipt to get warranty service.
By the way, I have the M14.ca CASM mount on one of my M305's, it seems pretty good but I think I'd prefer if it was steel instead of aluminum as it flexes a little if you pick up the rifle by the scope, not a big deal but it's only attachment point is the sight ears and it just has adjustment screws front and back to adjust the tension, this is good in that it allows you to effectively give your rail a cant to let you zero with your elevation turret dialed low giving you maximum dial up for long range shooting.
If it wasn't so expensive I'd like to give their long rail a shot, it looks like it would be a bit more solid.