Mounting a scope on an AR

I recently bought a Burris MTAC 1-4x24mm scope and was wondering your opinion on what you guys/ girls do. I am curious who would mount it with irons as backup? Who would take them off or who would get a 45 degree mount and put them off the side so you would have an instant backup. I hate to take the irons off all together after spending so much on them (Troy folding, tritium sights) and I don't like the idea of not having them as a backup. At the moment I am just going to use Burris rings till I can afford a LaRue mount. So what do you think?

*Disclaimer* I did do a search but there was so many results I really didn't want to take hours to go through them, but flame me if you must. Lol

I run troy BUIS with a scope. Mounted on a LaRue quick release mount. Buy once, cry once. Once you own it you'll wonder why anyone would use anything else.

I also just realized I didn't put any specs for the gun. It is just. 16" Bushmaster upper, with Troy 11" TRX Extreme rail, Spikes lower, with a Timney 3lb. Trigger and Ace skeleton stock. It is not for long range shooting with irons, I have a 20" for that. It's just a range toy/ zombie gun/ defense gun if need be. I also have a Remington 700 in .223 for longer scope work in that caliber. I have had a LaRue mount before and don't have a problem spending the money but scope mount aside the set up will be the same no matter what the scope is mounted in.

I use a Burris Pepr to mount my Leupold VXR. So far its been great.

Where'd you find your Timney SS 3lb? Most places seem to be out of them.