Hi guys, I got my E7/E9 combo in the mail today...Out of the box I gotta admit I'm not TOO impressed...The E7 works well with my brainwavz B2 but The E9 doesn't seem to affect much. However, this is also because I do not own any high impedance headphones so I have nothing to go by. The thing is I have a pair of Swans m50w on the way, so I'm curious if it will make any difference should I choose to keep/sell the E9 and use the E7 primarily as a DAC since that's mostly what I need, or will I be able to hear a significant difference in terms of SQ? If I were to sell the E9 I'd use that money and start poking around at tube amps like the Bravo Audio stuff on ebay, or maybe Sonic impact Class T-amp. Thanks in advance!