Just a comment that might even confuse you more. :P
I let one of my audiophile friend auditioned two amps he was eager to try, one was the Hornet and one was the Pico. He was looking for a suitable amp for his Sony A829 + Westone 3 too. After he tried out both, he was not impressed with both of it. He said that he still prefer the iQube amp that he tried before by a long shot. He said that the soundstage is obviously increased with the iQube and etc. I cant try it myself since I'm an unlucky guy who cant wear the Westone 3 no matter what tips I used(minus custom tips of course) So I cant give you my opinion
Anyway I hope this confuses you more lolx !!
Juz kidding, wish you luck in finding a good amp for pairing
that was nasty no wonder it sounded better with iqube; sony is too coloured allready to use with mustang->W3 IMO Iqube is a great amp, but some find it a little boring because its so transparent; almost not like you are using an amp at all. its also a bit expensive in the US and not so small either. great battery life, great transparency slick design though