Judd,
I've built myself four 6.5x47s over the past several years, including an AR10 on DPMS receivers with a 28" Krieger. Next 6.5 was an Eliseo RTS built around a Pierce TG action, with a 28" Krieger in Rem varmint/sendero contour. Then came a prone rifle on a BAT 3L in a McGee prone stock done on a really nice English walnut blank, with a 30" Bartlein med. Palma. Next was a tactical rig built on a new bare M700 from Brownells, with a 26" fluted Krieger in med. Palma, bedded in a Russo L5 stock. Finally, just this last spring, I got a DTA SRS chassis with a DTA 6.5x47 conversion kit.
I run Hornady, Lapua, & Sierra 123s in the AR10, tactical 700, and the DTA. The RTS & BAT shoot Berger 130 VLDs & 140 LR BTs equally well when loaded with RL17. Accuracy nodes with the 130s are at just over 2900fps, and just over 2800 with the 140s. I've shot three seasons worth of XC matches with the RTS, and feel the 6.5x47 is an excellent XC cartridge - very accurate, with mild recoil. I've also shot several 1000yd any rifle matches at Ben Avery in Phoenix with the BAT, sticking with the 130s in this bbl. Sure, there are chamberings that'll shoot well inside the little 6.5x47 in the wind, but it holds really tight vertical spreads, and again, is very pleasant to shoot over the course of a full day of shooting.
I've never shot a 6.5 Creedmoor, and probably never will, unless for some reason the 6.5x47 brass would suddenly become unavailable. There's too little difference between the two for it to make any sense for me to sell off any of my 6.5 Lapuas just to try a Creedmoor. More or less the same situation with the 260 - I've got a couple of 6.5x55 AIs, so if I wanted a 6.5 with more power than the Lapua, I'd just shoot one of the AIs.
Far as I'm concerned, the only downside to the Lapua is the price of the brass - but that's tempered somewhat by the excellent quality. I've never felt the need to do more than minimal case prep for the 6.5, even out to 1000. I've read comments from shooters who didn't like the Lapua due to there being only one source of brass, but the same's true of the Creedmoor, and if you're only going to use Lapua 260 brass in a 260. Pick your poison - they're all three pretty good cartridges - I just happened to get started with the Lapua, and have seen no reason to switch.