i was planning to buy the e7 and e9 combo, but your review, and others, made me think.   would it be possible to couple the e7 and e11 for portable use too only use the e7 dac and the e11 amp section or would it just mess  up the sound?   or in this case would it be better to go in a...

hey all, as you'll probably notice i'm new on this forum....   but thats not what im here for, today i stumbled across an offer of second handed akg k500 for € 50 so i thought that seams like a bargain to me, but as they're discontinued i haven't got a clue how much tey went for in the first...