Suggestions for Balanced DAC Upgrade?

As I proceed through my "8-year-upgrade", I'm in a quandry with respect to upgrading my DAC. I would appreciate any suggestions those of you still running separates would be willing to provide...

My system:
Theta Data Basic, cleaned up with a Genesis Time Lens
Theta Progeny A (nice and within budget in 1995, but currently weakest link)
Pass X1/X250
Thiel 2.4
Az Matrix Ref II, Kimber Orchid, Thetalinque

My desire is to complete the conversion to an all-balanced system. I listen exclusively to conventional CDs, and my tastes run all over the map. I enjoy a dynamic, clean and accurate sound.

With the DAC upgrade, I'd mostly like to achieve less treble hash and greater definition of individual instruments in complex musical passages. I also want to improve low frequency definition...

I've tried to bone up on Stereophile/TAS writeups, etc.., but don't find them too useful (everything's always "wonderful"). I realize the technology continues to advance quickly, so I'd probably get better results with a newer/less expensive unit than an older/more expensive one.

My kneejerk reaction is to pursue a Gen Va, but are there any other solid candidates in the $1000-2000 range? I thought about the Bel Canto, but it's single-ended only.

Thanks in advance for your help! I'm going to try to audition a couple over the next few weeks in the L.A. area, if possible...