Theta Chroma 396 or Aragon D2A MKii

Hi all, I'm taking my first adventurous steps into tuning my system and should be able to get my hands on one of the above used. But which? The Chroma has HDCD but I'd rather choose thinking about the reproduction of 16 bits, or 398 or my 400 CD's. All help appreciated.

My other option is to upgrade my DVD (equiv to US Pioneer DV-47Ai with the Burr-B DAC's) with a good clock and some upgrades. Anyone who can wrap their mind around all that HELP PLEASE!!!! I dont really care about anything but the front two channels, and the option which gives me the best bang for my buck for 16bit is what I'm after..

Cheers!