Gentlemen! I've been reading the forums for months regarding amps, dacs, k702/q701, and k550s. I have this illogical devotion to AKG, due to my previous AKG headphones, and have trouble deciding between two different type of headphones. I recently received a cash bonus from work so I have the green light to finally make the purchase. Headphone Options K550 Sealed Q701 Open I understand the headphones have a different sound signature regarding treble/mid/bass. The burn period with the Q/K 70Xs and the fact that they are relatively hard cans to power since they are low impedance. In researching for Amps and Dacs.... I ended up identifying 3 good combinations at different price points. Lyr + Bifrost for K/Q 70X primarily Audio-GD NFB 12 O2+ODAC E9+E7 Combo (Scratched off) The prices do range and after reading a lot about the NFB and O2+ODAC... Their prices make them seem like great value as well as performance. Sounds quality is one of those touchy subjects... I mean opinions on quality can be white/black for example regarding the quality of certain Beats or a low quality headphone that has distortion at low volume levels. But when you start getting into the higher quality products it becomes more subjective on the subject of sound quality. I unfortunately do not have access to any amps/headphones to test. I have heard great setups before but I don't have access to what I want to buy. This setup will be plugged to a PC, I play games and I listen to music ranging from studio quality to crappy old 128k internet radio. I listen to all types of music. My question is which combo would be more versatile or better overall for day to day use. I've read the q701 has a great sound stage and the k550 have a warmer sound. But overall I'm not sure what would be better in general for the gaming/music listening I do on a daily basis. TBH I've exhausted the research... I'm just waiting for someone to push me in one direction to get this purchase over with. I'm willing to take other advice as well. My budget is no more than 1200.