As for the Krell, the chip is only part of the story - otherwise they would all sound the same, would be a good deal less expensive, and we all would be running PC cards like the STX II. I found the B&H listing. Still mulling over the following:
I'm holding off at least till the Anthem amp gets here to do some A/B testing with the current system. Still kicking around PC card versus pre/pro. The litmus test for the pre/pro is quality of sound over the card. It appears that the card holds its own in most catagories, but comes up short in catagories such as soundstage. Secondarily will be Bluray formats - still getting up to speed on how who is releasing what music formats on bluray. Back in the dark ages, when Fleetwood Mac released The Dance on DVD, my state of the art Pioneer LD-DVD, just a few months old, needed rechipping to handle it.
The anthem 50 pops up occasionally, sales range from 800 to over $1k. There may be opportunity there - it looks to me like prices in the component market are softening.