Well here is my opinion and one in which I can't wait to build as soon as funds are available to me. It will fit your bill except one criteria and thats recoil. While I have never shot it I have heard its up there like the 338 mag or more. Well its the great 8mm rem mag. Will do anything in NA and africa. Talk about versital round. People will tell you there are no good bullets available as there are plenty of good ones. You just have to reload to get the good stuff as you reload its a moot point. Its also not a common caliber so it kind of cool in that regards. Well good luck but if truth be told your 270 is great you just need to load up some 140 TSX and never look back.

Brian