Nothing against the .270win or the 30-06, but "western" means long shots are a possibility, and "all around" means big game (elk, moose, bear, etc) are on the hit list. For long shots AND/OR big game, you'd be better equipped with a magnum in the .277, .284, or .308 calibers. I'd put the WSMs at the top of the list with the 7mm Rem mag, the 300 Win Mag, the Ultra Mags, and the Weatherbys as close runners up. You couldn't go wrong with any of those choices. I have all of them, and shoot them regularly, and my favorite is the Remington 700 CDL-SF in 270WSM accurized by Hill Country Rifles. It puts a 130 E-Tip in .5 MOA at 3343fps.
Hope that helps.