I just scored a slightly used Sony DVP-S7700 CD/DVD player that is supposed to make an excellent transport (on the same level as some Mark Levinson stuff) for about $200. Original list was $1200, it was Sony's top of the line DVD. And it can be modded for even better performance.
Regarding DACs,
Several provide significant steps up from ordinary CD players (art DI/O, Ack dAck!, Scott Nixon TubeDac, and Channel Islands Audio). But it seems that the Benchmark and Perpetual Technology P-3A are a step above. All but the Benchmark have modifications available. The DI/O is too strong with a warm sound in stock form, most advise to go to Wayne at Boulder Cable for the full mesna mod with power supply ($650). dAck! doesn't recommend mods and has low output, but is battery powered and provides a very black background ($525, $1050 modded by Empirical Audio). TubeDac is the cheapest built, warm sound, not recommended for mods ($600, $900 modded by Empricial Audio). Channel Island is simple, has approved mods available ($350, $700 fully equipped/Modwright modded). Benchmark is $975. P-3A is $800 stock and can be modded by Modwright or Empricial Audio or mated with the P-1A with cost running over $3000.