Can't help you with the 7mm-08 (even though I'd love one), but I will suggest a 15" barrel, preferably with a heavy taper or full bull contour. If you're interested in something a bit more handy and are willing to sacrifice a little velocity, I've found 12" barrels to be a pretty good balance.
Formerly TN Lone Wolf
"We are only as strong as we are united, as weak as we are divided." - J.K. Rowling