Hi.
I'm going to straddle the fence on this one, and say that you really couldn't go wrong with either 30-06 or the 7mm Mag , either Remington's original or the new Winchester Short Mag.
Choose your rifle and caliber based on what feels the best, and therefore what will shoot the best. Both will do the same job, and while the '06 is the "standard" against which others are judged, the 7mm has been around long enough to become - at least in my mind - the standard magnum that I use as a bench mark. Powerful enough, but just below (in both configurations) the power curve where your teeth and vertebrete will be left intact after shooting it.
These days, your real thought does need to go to ammunition, i.e. bullet choice. I personally have had better luck over the years with Sierra and Hornady products than Noslers. Sierra's hollowpoints in 7mm and 30 caliber appeal to me, and Hornadys new offerings in the Interbond bullets for 7mm and 30 cal have my attention. Developing Interbond loads for my 7mm WSM and my 30 cal are on my list of priorities. Winchester and Combined Technologies (yeah, I know, aka Nosler) are turning out some really interesting stuff.
Pick up a few guns, see which one feels the best. Get a good scope with plenty of eye relief (Leupold or Nikons are my choice) so you don't get dinged up when sighting in and practicing. If you are recoil sensitive, get a Simms Limbsaver put on your weapon by a gunsmith and consider wearing a recoil shield when practicing - worth every penny, let me tell you! Then, once your package is complete, carefully choose the ammunition that you are going to use. That bullet is the only physical item that will come into contact with the animal. After you pull the trigger, everything else you considered won't matter if that bullet doesn't perform worth a darn. THAT is where your concern should be.
Good luck, and I am envious!
Matt