+1 for the Zeiss. I have a 6.5-20x50 Conquest on my varmint AR, and have no complaints whatsoever. It is clear and crisp from edge to edge, never loses zero, and seems very solid. I compared them side by side when I was scope shopping. Not to get off-subject, but another good one is the Burris Fullfield II. Good glass, great warranty, and a nice ballistic plex reticle. I have one on my 300 WSM. It's been used, abused, dropped, muddy, cold, hot, and has held up through hundreds of 300 WSM rounds without losing it's zero. They cost quite a bit less too.