I run all my asics on the Odroid u3 from here
http://hardkernel.com/main/products/prdt_info.php. which uses the Exynos quad core cpu.
They run standard linux, don't have usb issues like the PI and run bfgminer, cgminer, minera and assorted other miners with no issues.
May have to try one of these out. I have a couple Pi's which suck and BBB (Rev B hotplug works and seem better then Rev C) have run 5 g-blades on Rev B with debian, a cubbieboard2 was next on my list to try along with a galileo.
I have emailed them inquiring about a review unit (doubt they'll send me one) but if i do get one sent free i will be able to try it out and see what works on it easily and how its runs and if it can be a true PI replacement for miners.