I use very nice Infrasonic Quartet card for a long time, but unfortunately now I need to move to PCI-Express device. The only thing that has same features as Quartet, but on PCI-E is MAYA44e/XTe. The main problem for me is good full-power sound in headphones, without that nasty bass frequency loss. Quartet don't have this problem at all, and what's with MAYA44XTe? Again - I don't need "blood-from-ears" loud volume, I need BASS. Who tested MAYA44 with good headphones...