I'm running two obsolete Conquests on my .338 WM and .375 H&H. The former wears the 2.5x8 and the latter the 1.8x5.5. These scopes replaced the Leupold 2x7 and the B&L 1.5x6 respectively.
In addition to the above poster's recommendations, I would seriously look at the Weaver Grand Slam, which is currently on sale at Natchez.
http://www.natchezss.com/product.cfm?contentID=productDetail&prodID=WE800471&src=exrbSrch
