[Meliphcient]

Hi, I've got a tidbit of cash leftover from Christmas ($600ish AUD) and I've decided it's time to get a better amp.
I currently have a set of 32ohm DT880, AKG K701, and am looking to pick up a pair of Alessandro MS1i
I have an Audio-GD NFB-2 http://www.audio-gd.com/Pro/dac/NFB-2/NFB2EN.htm
I listen to a fairly small selection of music:
Nightwish, Flowing Tears, Strapping Young Lad, Theatre of Tragedy (early work), Xandria
 
I had thought I might get an Audio-GD C2.2 to match the DAC and try out ACSS, but I might be able to pick up something else second hand that's better. Perhaps a Burson HA160? I'd like some amp suggestions to go with my current gear and budget

 

[Meliphcient]

Someone's gotta have some input :|

 

[JuicyBruce]

Melbournite!
I have an NFB3 and a C-2.2 and im using K702s.
Before that my amp was an M-Stage which is known for being a good budget match with the K70x.
And I believed that until I got the matching C-2 however the upgrade was staggering. ACSS is the shizz. 
It really is worth going to ACSS route if your DAC supports it.