If i were you, I would buy a guys Sony C90 which is almost brand new (one of teh best DAC sections available). Then, buy some used Mcintosh, Arc Audio, Brax, etc etc....
speakers: I see lots of Dyna systems, Focal, etc for sale.
Subs: yeah, new Lambda PB series, and an Elements Enclosure ( A lil expensive, but its cool looking and different) check mine out here:
my stuff As soon as you buy new, you loose 50% of the value, and most probably you will end up upgrading anyway!