Depends on the system: in the big rig, it is almost all Purist Audio Design Dominus and Venustas (TT to pre, CD to pre, pre to amp), Krell Cogelco Black R2R to pre, MIT 330 tuner to pre, Nakamichi Blue cass to pre. Speaker cable is Purist too (tri-wire to B&W 808s - almost 30 years old and still roaring!)
The vintage system: some monster Interlink 4, some MIT 330, some Esoteric Audio that is so old I don't even remember where it came from, and some home-brew solid silver from a recipe posted on Soundstage.com. Still looking for some better speaker wire here. Using Esoteric Audio from SX-1010 to a set of B&W Matrix 1's ($8 for the pair at St Vinnie's)