Thanks again to everyone who has offered help and suggestions. The Audio Mirror looks pretty attractive; Ive been reading good things about it.
Well, my system has been built on a low budget. I know that there are a few elements that are responsible for some of the brightness. My amp is an NAD C 340 integrated, and currently I'm using an NAD T 532 DVD player for CDs, and a Sony DVP-NC685V for SACDs. The NAD sounds MUCH better on CDs than the Sony does, but it belongs to my dad and he'll want it back in a few weeks. After which, I'm back to the Sony and another cheap Philips CD player that I have (CDC-751, actually sounds better for redbook CDs than the Sony). My speakers are a pair of Triangle Antal XS, which are the culprit of the bright sound. I've heard that these speakers go very nice with tubes, so I'm thinking that a tube DAC may be able to level out the high end. The speakers are toed in, and the manual states this is the best way to have them. The speakers are firing long ways across the room, and I have some blankets up on the walls to help with standing waves. The room is about 13' x 16', a medium-sized bedroom.
Either way, I think upgrading the DAC will be a huge improvement. Right now I'm using QED silver anniversary biwire speaker cables, but those will need to be returned eventually also. I'm using Acoustic Research Master Series interconnects. Any suggestions on cables or anything else to help improve the sound?