From PC / Mac to DAC into Monoblocks, Direct?

Hello Everyone

For a newly reconfigured system (although keeping my Tympani IVa's) I want to use PC/Mac only as a front end, with monster monoblocks to ensure ample power to the Magneplanars.

With one source, I have no real need for a preamp, so I have been intrigued by other threads on Audiogon praising the performance of direct from DAC to amplifiers. (?)

Having always admired the looks of the Pass amps, I am thinking about a pair of X600's or 1000's.

From there, however, I would appreciate any advice on

1) PC vs Mac?
2) PC / Mac Interface?
3) DAC? (which can work with only an amp, obviously)
4) Cables?

to try and get as good as it gets with PC audio.

Extra credit for anything as impressive looking as the Pass monoblocks.

Happy New Year,