Dear Atomic Chicken,
A few additional thoughts:
1. I don't know whether or not you have finally ruled out the .260 Remington. However, if you are still considering it, then you may want to look at the posting called "Fate of the .260 Remington" that is listed under the Category called "Medium Bore Rifles." I was very interested in the .260 Remington, but have come to learn that despite its great ballistics and good reviews, it is a commercial flop. Browning has dropped the round from its A-Bolts this year, and I think that only Remington (700 BDL only) and one other maker still make rifles in this caliber. In a few years, it may be very difficult (or impossible) to find factory ammo for this round, and so you will have to count on saving brass and handloading. Apparently, it was just too close in performance to the 6.5 Swede to gain in popularity (even though it comes in factory loaded 120 grain bullets.)
2. You are smart to delete the 7mm-08. It is a great round, but it is just too close in performance to your .308 Winchester to give you anything new in your battery. There is not 5% difference between these two rounds.
3. It sounds like the .243 Winchester, with 100 grain nosler partitions, will fit your bill nicely. However, perhaps, what would fit your bill better is the brand new 6.8mm Remington. Do some research on this new cartridge. (There are articles on line.) It gives you exactly the same foot pounds of energy as the .243 in 100 grain, but it does it with a .27 caliber 115 grain bullet, and with the trajectory of the .308 Winchester. You get a heavier bullet, and a much better ballistic coefficient. (In other words, a better round for deer.) This round has been invented for the U.S. special forces, to replace the 5.56mm (.223 Remington) as the standard rifle round. It has been field tested in both Irag, and in mule deer hunting, with great success. It is currently available in three factory loads by Remington. Remington will be unveiling bolt action rifles in this caliber very soon. I predict it will be a huge success.
Best Regards,
Big Paulie