A new rifle on the market that i think is just plain awsome is the savage lightweight hunter.
Check them out here:
Savage Arms Firearms > 111 Lightweight Hunter
Savage Arms Firearms > 11 Lightweight Hunter
Long action comes in 6.5x284, 30-06, and .270. 6.5x284 would be sweet for light game and the 30-06 with 210 or 190 VLDs or a 200 AB would kick pretty hard, but have some thump to it.
Short action comes in .223, .243, .260, 7-08, and 308. A .243 for light game to 500-600yards would work, and .260, 7-08 and 308 would extend that a little.
Once they come out in left hand, i dont think ill be able to resist one... probably a .308 but that's because im a big .308 fan and i would use it for 300yards and in 90% of the time, i have dedicated custom rifles
for further out.
Not saying it wouldn't be capable, but just not what i plan to use it for.
Also, you need to realize it is very difficult to an ultralight rifle like this with the accuracy needed at long range... even my buddy's 9-10lb .280 rem is ok, but definitely harder to shoot accurately at range. Plan for a lot of practice!