The metal form factor makes it look light years ahead of the E06, though I, like most others, am really curious to know how they compare against each other. The specs look pretty similar and there's probably not much progression to be made on such a brilliant entry amp as the E06. That said, the A1 look niiiiiiice!
On a related note: It was mentioned miles back in the post about the A1 name being shared with a previous FiiO product and this got me thinking about the new naming conventions being used. Is there an official release yet as what they are supposed to mean? So far I'm guessing the A-series as being portable amps, the Q-series as portable amps/DACs, the K-series as USB/externally powered (i.e. desktop) amps, the X-series as audiophile DAPs and the M-series as casual DAPs. Then we retain the L-series for cables and the E-series being kinda re-used for headphones (EX1= Headphones for X1, EM3= headphones for M3 etc.). Is this right? It'd be interesting to hear FiiO's take on it all.