I have a DAK-2800PC that I modified by changing the caps to Nichicon. In regard to the turntable cartridge you will get whatever results they normally deliver. I use a rega P-3-24 and a Grado Sonata cartridge. I can not tell CD from vinyl when playing back from the computer.
Converting Vinyl to digital
I saw an interesting unit in JC Penny's today. For $99 you get a record player and you can feed your LPs to either a computer or burn a CD. While this is probably not the best choice for an audiophhile, I am curoius what is out their that will do this to satisfy at an audiophile level.