building the best system I can?

You might get more (not necessarily better, though) responses re your digital source question by starting another thread in the "Digital" forum.

4musica44107 Thanks for the suggestion I will send my question over to the digital forum. Now lets get back to amp/pre talk. I am seriously thinking of going with a mccormack dna 0.5 or .1 amp, so does anyone have any ideas on a good preamp match? Would ss or tube be best suited with the studio 20's?

I think you would be better offer considering how a given pre would match with the amp, before the speakers.

Does anyone want to give some suggestions on a a preamp for the mccormack dna amps?

It depends on the particular McCormack amp, they have differing considerations.