if you want the best, and money is no object, get a Nightforce NXS, US Optics, or Leupold MKIV. You will not be disappointed. Any of those will complement your flat shooting long range cartridge. Also, remember to buy high quality bases and mounts. For $2,000.00 you cant get really nice stuff.
...I'd say get a Leupold or possibly a Leupold. If I couldn't find one of those right away I'd hunt around for a Leupold. Around 3 x 9 x 40 suits me. I don't care for monstrous scopes.
Zeiss Conquest, I agree with the other poster. It has been, hands-down, the best bang-for-the-buck scope I've purchased. I picked up a 3-9x40, with the RapidZ reticle. I love it!
I'll add to the fray... Nikon. I feel like I've gotten every pennies worth out of my Buckmaster and my Monarch scopes (and a Pro Staff now that I think of it.) For $700 bucks, you can get any one of a number of higher end Nikons. I've got some Leupolds that do great too, but Nikons have been just as good for less money.