Here's an example of a system that would allow you to get into playing digital files at some future date. Total spend on gear is estimated at $3,550, and decent (but not high end) cabling at $1,450. For cabling, there are a lots of used deals in the price range I quoted.
All prices for the gear below has been found on either Audiogon or USAudioMart. With a bit of negotiation, you could pay less.
Doge 8 tube preamp - $1,000
Teac UD-501 DAC - $600
ADCOM GFA-555 monoblocks (600 W) $550
Denon DVD-2900 SACD/CD player $200
Yamaha NS-1000M speakers $1,200
Sub-total: $3,550
cables:
Wireworld Equinox 7 speaker $500
RCA interconnects (3 x $250) = $750
Coax (digital) cable $200
Sub-total: $1,450
Grand Total: $5,000
Enjoy the search!