If you want a detachable cord unit look at the new denon 3805 it has a detachable cord and a lot of newer features compared to the 3803. I have been using the analysis plus Power Oval and the Oval 10 with excellent results. I should add I'm a dealer for both, so I have not tried other power cords with this unit.
Denon 3803 No Detachable Power Cord Why?
I recently bought a 3803, to upgrade the cord I have to void my waranty, doesn't Denon want their equipment to perform it's best? I also purchaced a Denon 2200 DVD it has a detachable cord and it's half the price! Is it worth voiding my waranty to upgrade or should I just sell and buy an amp & pre/proc and be done with receivers?