I put a Leupold VX-6 2-12 on my 270... Since we do some open field hunting, the Boone and Crockett reticle is really nice. My son has made kills out to 450 yds.
Its the first generation (not HD glass), IIRC, i paid about $600 for it.. It's an obvious step up in light and clarity over the VX-3 that was on it. We're real happy with it.