I'd leave well enough alone, that's a nice scope on it now.

If forced, despite a smaller eye box, the 4.5x14 Leupold is a good one. My .264 is my antelope rifle, this scope (w/ B&C) and dual dovetail mounts, make it sing. The rifle (one of the limited run New Haven Model 70 SGs in about 2000) is a tack driver, and I like being able to run the scope up pretty high for a very long shot.