Hi i'm new owner of this beautiful piece of jewel.
After iriver clix2, sansa clip+ and previous Cube C30 i did'nt expect any bigger leap from C30, but
yea Rocoo BA is better, more detailed, better in any aspect.
But back to FW, i changed original FW for BA (same for P)
to Studio DT-DYNAMIC 20111223 because BA player seems little buggy but it didnt help, never mind, will wait for new FW, but SQ has changed , now i feel little more bass with little more dynamic from bass to midrange and highs are more polite , so maybe for rock and metal it is good choice to swap FW from original to dynamic, i have IE7 so with dynamic FW i can feel better bass but from the other side less higs so now i am little confused, will give it more listenings and will see if i change it back to orig. FW maybe for IE7 is better little less bass and more highs.
Overall FW change SQ , but still waiting for new FW