Hi I've just bought HD 600 for mixing producing etc. after tryin out lots of cans i prefered 600's much more than any other. now i need  an Amp so i  consider buying Matrix, however i own an interface Lexicon Lambda but it has just super bad HP out, my N8 phone sounds much better, maybe it's...

Btw i just saw USB Matrix M- stage is this the same unit but with  built in soundcard ? what are the difreences ? i guess it would be perfect for me to just take m stage laptop and cans anywhere does it sound the same ?  

I am looking for budget DAC for mixing depending on wich i can get cheaper i will get either of HD cans. from budget options i've seen MATRIX RIP USB DAC however i can't find no opions about it. My budget Maximum is Matrix M-stage its just about 100$ more. Can You please tell me if there is...