I've got a Fiio X3 v3 on the way today along with a 200GB Sandisk card. Finally upgraded from my ancient Sansa Clip Plus which I loved but is now 5 years old and falling apart. With the Fiio - is there anything a beginner might not find so obvious at first? Also does anyone have opinions on running original firmware vs installing Rockbox? Rockbox was clearly better on the Sansa but that's a much older product.