I have been very impressed with the XPR (Vortex combo in 6.5)...especially for the price after you factor in the $100 rebate. I haven't shot any of the new AB3s but don't see a reason to as well as the XPR handles and shoots. Has a lot of the great qualities of the Model 70 at an amazing price point (can be had for under $400 if you shop around).

Edit: There were some guides that posted in the big game forum (I think) stating the A-Bolts had poor performance in Alaska (or similar) cold/rainy/crappy weather. I am a big fan of the Hells Canyon and don't want to start a Browning war...just pointing something out that you may want to be aware of or look into further.