Good DAC & Amp for Beyerdynamic T70? 500-600 range

[designbykai]

Hi, I posted this over in the T70 thread, but thought I might get more help making a dedicated one. Just wondering what people think about Dac/amp combos that'd be good with T70 (250ohm)?
I'm running them straight out of my Edirol soundcard (FA-101) and they do sound great but I'm sure dedicated dac/amp combo would be better, that is a bit more up to date and doesn't have a whole bunch of inputs, pre-amps and stuff bundled in.
 
Budget around $500-600. Don't really want to mess around with Tubes although I've heard they might be good with T70?
 
Options I've thought of so far..
Schiit Bifrost + Asgard
Cambridge Dacmagic+
Cambridge DM100 + Matrix M-stage
Audiolab MDac
Audio-GD NFB 2.1 or NFB-17
Nuforce Icon HDP
 
Most of the dac/amp combo units above, apart from the Nuforce, offer balanced XLR outputs which I can feed to my powered Studio Monitors, which is very handy.
But sound quality is most important thing. I think I can handle using RCA/Coax!
I don't think these T70s need a huge powerful amp - thats the whole point of Tesla - so in-built HP-amps in the Dacmagic+, Mdac etc might be OK. Just doubt they're the best quality?

 

[Synthax]

Well, I do have T70. To me best way is to take some Violectric or matrix M-Stage. These phonescwork great with rather warm amps. If you have to take one from your list please consider Matrix or Audio Gd.

 

[Synthax]

And what did you choose finally?