I would suggest getting the STX II and upgrading the op amps. I know you said you don't think you want Bursons, but they really are the best op amps. They don't "color' the sound really. You get the sound the way the audio engineer mastering the track wanted you to. As long as you don't use the EQ that comes with the driver software, it will be reference high quality sound. I have 3 V5s but you could also try the V6 classics or V6 Vivids. I can only attest to the greatness of the V5s though. You will need to replace all 3. Headphones is just the 2 I/V and the RCA out is all 3. You won't regret getting this sound card. I have some $90 monitors sitting on my desk and paired with the V5 op amps they sound amazing. My wife even commented on how good the sound was and she's not all into gadgets and electronics like me. I use my HD6xx headphones most of the time to avoid disturbing my wife and neighbors, but when I can crank up my speakers they are awesome also. I can't recommend the STX II with Burson amps enough. It has sound quality to setups 3-4x it's price. Good luck my friend!