Ok I am going to need some guidance here. I know it's probably been covered before but I have a limited time frame to make a decision and I don't want to spend money for no benefit.
I have my HD650's and a Asus Xonar STX Sound Card. I am told it's a good dac/amp. I am trying to decide if I should ante up for a better amp and dac or combo.
Right now I am considering:
O2 Amp and Dac
Bottle Crack Amp (Can you buy these assembled?)
Asgard + Bifrost Combo.
I listen to mostly pop music from my PC/Laptop. It would be bonus if it could work with my RX-Z7 Home Theatre Amp, but it's not something I would pay significantly for. Portability isn't really interesting to me, unless I could get equivalent sound from the portable option.
I am not sure how to measure everything against potential. If we said that the HD650 was a factor of 1, and the STX was a fact of say 5 (if that's the case) and 10 is the best that the HD650's could ever sound, then where would the options listed above rank? I know it's a little opinion based, and I would prefer no hysteria, but I am happy to spend some money if there is perceptable differences. I am not really interested in spending $500 for a 1-2% difference that it would be questionable I'd notice.
Any advice gratefully accepted.
One Final Question;
Do you think the HE400's are different/good enough to buy to try against or to complement the HD650's?
Ok perhaps I overcomplicated it, which of the 3 Amps or Dacs I am considering is going to get the most out of the HD650's? Are these enough of an upgrade for me to see a noticable improvement over my STX?