Hi All, As the title says, I'm looking at upgrading to either the WA-7 Fireflies or a Matrix M-Stage DAC + WA6 (w/Sophia Princess Rectifier). These two options both come out at the $1000 mark, but what do people think is the better option? I'm currently running an ODAC+O2 Combo with Beyerdynamic DT880 (250Ohm) as my main cans. Also have the Audio Technica ESW9 and Alessandro MS-1. I listen to a lot of rock, pop and acoustic with particular emphasis on female vocal performances. Would love to hear peoples opinions.