After reading this thread, i tried the bug head player myself. My PC allows me to go upto 10% degradation. With upsampling to Normal and everything else to default, i started my test. Started with Paararuvaaya from Thara Thappattai. That is a brilliantly recorded and very well composed song from maestro. What i immediately felt is a ringing in the decays. I switched to JRiver and compared. It is there as well but i haven't noticed there before. The rest of the spectrum remained almost the same. Bug Head is adding some additional ringing to the instruments. In this case of classical instruments, it was not good. I am not sure whether i have tor try any other setting. When i tried something random black magic, ringing became worse. I moved from Foobar to JRiver because of the better texture in bass. I am not sure what additional differences you guys found in Bug Head. Please share the positive experience especially when compared to JRiver.
My first attempt has failed. But, i believe there is something more into this player. It hasn't yet convinced me to give up JRiver.