Well, $300 on Opamps is surely too much for me, i was kind of hoping the single 100$ one would be enough. At this moment i am not considering swapping opamps as i have dangerously little idea about these things and how to handle them. So i guess i ll just wait till i get the Claro Halo and i ll let you guys know my impressions.
There sound quality is subjective at best and you may or may not like them.
Get you card home, listen to it and then if you think it needs some changes to the signature post back and some of the opamp experts can give you some ideas about units that might help you get what your after.