Just noticed a new tuning called Basic X in place of the usual sGalaxy. It's the default tuning. I'm using it right now. In fact I'm playing completely default at Normal at x1. I've stopped using x4 upsampling for quite some time now as Normal sounds very good. Also, it's much less demanding of RAM (just under 3 GB is required by Infinity Blade during normal playback, though it can peak to as much 27 GB during the initial Rewrite process).
For those on Windows 10 and Windows Server 2012, I strongly recommend that you follow Keith's optimisation steps. They've really helped to completely stop processes which one doesn't need for music playback. They also optimize the operating system in myriad ways (power management, clocking, processor core assignment, etc). I've beta tested all the steps and scripts and they work beautifully. I don't face any more problems playing Bug Head due to computer resource crunch, though I've chosen not to go extreme with the settings (like many JPlay users do). Strongly recommended. Only caveat is one has to sit down and manually do all the steps one by one. It took me two sittings spread over about 4 hours and 1 and half hours, respectively.
For Windows Server users, the alternative is to buy Audiophile Optimizer and Fidelizer and use them together. Win 10 users probably have to set Fidelizer to extreme to gain what I've gained from Keith's tweaks.