My early 2009 mini, used as an HTPC, can play 1080p smoothly from downloads, but it stutters on playback of some (not all) Blu-rays, even if I rip them to the internal SSD. It simply can't handle h.265 at all, the video is mostly glitches with occasional glimpses of proper frames. It's maxed out for memory so it can't be upgraded any further. It's time to replace it, so what is the minimum mini spec I should be looking at for guaranteed smooth playback of all Blu-rays and h.265? I'd rather go for an official refurbished than a brand-new.