The RAM on the Note 3 was never the issue (because there's plenty of it). The point was to close background applications (regardless, moot issue now).
Viper4Android has me rushing out right now to take the FiiO X3 to UPS (to ship back). I wrote earlier that I might try the HM-802 next. That's not going to happen now. I too can't imagine it being better. As for an amp, forget about it. I've only scratched the surface with the Viper app. With a minor bass boost, songs are rattling my tonsils and yet aren't touching the mids and highs (which are also improved).
It's time to enjoy this for now.