Well since youve narrowed down the seletion to a 6.5 caliber and all of the ones you chose are very good mid range rounds, id say the .260. Brass availability is no issue. The creedmore is the new kid on the block and just as good as any. More rifles are built from the factory in 260 today than the rest of the group you mentioned. Tons of info for loading. Plus mid range isnt the only place this round shines. Its a fabulous 1000 yd round with Berger, Sierra, Lapua or Hornady Match bullets. Recoil is also mild in a mid weight gun. My choice would be (and has been) the 260 for your ideal 6.5 mid range deer round. I too would prefer a 7mm bullet if you had it as an option. The 6.5 is great.