Woods,
I like the 6.5's. I already have 6.5 WSM, 264 Win Mag,and 6.5 RUM. I have a new Remington PSS in 7mm Rem Mag just wanting to become a 6.5 Rem Mag. Being a short version of the 7mm the magazine will work perfectly. I think the 6.5 would be great with the medium weight bullets in the 100-120grs. A lot of people give the 6.5's a bad rap for no reason. Like the 264. WM being a barrel burner, which it can be, but you hardly ever hear that about the .257 Wby. Mag which is more overbore than the .264. The 6.5 Rem mag has never been given a chance either. Remington has brought the 6.5 back out but need to chamber the round in better looking rifles than that 673.
The brass I have found is cheaper than the SAUM and reasonably priced. Redding and RCBS both stock standard FL dies and Redding offers a type S bushing die that can be ordered. It looks as if the materials would not be hard to find.
I'm pretty sure I'll go with the 6.5RM, can't fine anything negitive about it. The people who have give them a try love-um.