I concur that a visit to the optics forum on
www.24hrcampfire.com will be worth the time.
I would also recommend visiting
www.longrangehunting.com, and reading the article about building our own tackdriver on the cheap. Combining the education you would get from piecing it together on your own with the satisfaction it would bring and the savings seems like a great plan; however, if you have more money than time and want to keep it on the down-low, your options are many.
You could get nearly any solidly perfoming rifle used or off the shelf, re-crown the barrel, lap it, glass bed it, tune the trigger and spend some quality range time working up your own handload and have a consistent sub-moa boomstick. Getting to far up a gnats behind on the rifle makes little sense when you will most likely be the weakest link in any decent set-up.
Other factors to consider: how far do you want to hump this thing? If you are a horseback hunter or go in on ATV's, weight is mitigated. If you are interested in hiking back into the mountains several miles on your own, it's different story. For what you want to do, I think (and any man who is being honest with himself will agree) you need at least 4 rifles with glass to match.
Seriously, if you want a long range target and a big game rifle, get both. For what you are talking about spending, there is no reason why you couldn't do 2 for that.
The best advice has already been given. PRACTICE, PRACTICE, PRACTICE. You would do well to take a lesson or two from someone with a lot of experience.
For glass I have not heard a bad thing about any scopes from Nikon on up. I am getting ready to pull the trigger on a VXII 3-9x40 and put target turrets on it so I can practice long range with my .308 as well as have a greater degree of accuracy in the field if I want to go long; I am talking in the future after much practice since my limit at the moment would keep me inside 300 yds.
Good luck with your search; it's half the fun.
Steve