I'd suggest an ARMS #18 and a set of rings. I went with the #22's. If you decide on ARMS, go through Frank Sottile
http://www.battlerifles.com/viewtopic.php?t=714&highlight=frank+sottile
No one beats his service or prices.
There aren't many real choices. Y'either choose ARMS, Brookfield, or Smith, and you'll have either a hell of a time finding the Brookfield or Smith, or hock your kidney for it. ARMS is probably the "cheapest" compromise. That's not to imply they're junk, like the SA's. Given an opportunity to switch out my ARMS mount for something else, I wouldn't, no matter the cost; mine hold zero just fine, after ~1500 rounds and > 125 R & R's to clean the rifle. Lap the rings no matter what you do.
For a scope, I'd recommend either a Burris Black Diamond or a Nightforce. I'm not big on Leupolds; I know they've got a very good warranty service reputation, but I think there are several companies out their with comparable glass for less money. I find Burris BD glass easily better for less cost and the same warranty. (In my opinion, Leupold has a hold or the market much like VHS tape manufactureres did in the old days--Beta was better, but VHS marketing cornered Beta and crushed it.) Nikon has a good rep too, for almost the same money; Sightron is equal in glass quality to the Leupolds for half the cost, and I've heard their service is very good but have no personal experience with them. The Tasco Super Sniper is a pretty good scope in the $300 range (IF you buy it from SWFA. There are other older SS versions out there made by junk sub-contractors, but SWFA has the QC under control with an exclusive contract now). If you can consider the next step up in glass over $6-700 range, I'd suggest Nightforce, Swarovski, or Zeiss (this stuff is so "high-line" it's more a matter of personal preference than optical quality). But no one in their right mind would argue Leupold, Nikon, Sightron, Weaver to be in the same optical class as these last. No matter what you choose, you'll need a cheekpiece.
For a bipod, I prefer a 6-9" Harris BRM-S w/ notches.