DK- I've just been going through a general upgrade over the last 2 years, and the CDP is the lone remaining electronic component. My most recent change was a substitution of the 0.5 Rev B for the 0.5 dlx I had previously. It is WAY better, but at first it seemed like the high end was a little too prominent for my taste. I am using HGA silver ICs and Silver Sonic t-14 speaker cables, so that may be some of the issue. I have upgraded the power cords and added a Chang Lightspeed in place of my Monster HTS 200 and that seems to have helped in taming the high end, or maybe it is just that I have gotten used to the new sound. It is more detailed without being artificial and I like that. I suppose I am just chasing the holy grail, i.e., another significant upgrade in sound without a major investment in $. I don't have a realistic way of auditioning equipment, so generally I am looking for well known and well regarded brands that I can re-sell if not satisfied. So far that tactic has served me well. I have added Vibrapods but do NOT have a well-isolated rack. System is in the LR and WAF is a major issue. I also suppose that I am putting off dealing with the other non-upgraded item, my Vandy 2cis. Was second in line for a good deal on some 3A sigs this a.m. (damn!!!) but maybe that is the road I will have to travel. Any recommendations greatly appreciated.