Heavy duty rings?

[JellyBelly]

I've got a set of Leupold Mark 4 rings but they're too low for the scope I intend to use on my AR. I don't feel like spending Leupold's price for another set. I've been looking at Burris's Extreme Tactical rings and they look every bit as strong for about 1/3 the price.

Are they good, and what else is out there for me to look at?

[Speedrock]

Have a leupold on own Rock River using Warne high rings on recomendatin of Chuck Taylor. Price is right and have certainly been without problems.......

Brownell's used to carry the set specifically for AR rails but don't see them on their Site now?