I have two hi-fis and a minisystem.
The minisystem is a Denon DM31 with SCM101 speakers. It lives in my bedroom, and mainly, sadly, gets used for the radio.
The main hi-fi has it's own room, with my music and DVD collections, my TV, my Xbox, my winerack, etcetera. It's a NAD CD521Bee player, Cambridge Audio Azur 640A V2 amp, Pro-Ject Debut turntable, NAD phono amp, Tannoy R1 speakers, on an Atacama rack and Target speaker stands. Cables are Qnect 4s from the NAD and Qnect 2s from the phono amp. Speaker cable is Cord Company Silver Biwire. I run my shitty Toshiba DVD player through it too.
The other hi-fi is in my bedroom and is my, oh sweet fucking geek, "headphone rig". It's an old Marantz CD67MKII player, a Beresford TC7510 DAC (the analogue outs on the Marantz are faulty, so this takes a digital output from it) and a Meier Audio Corda Headfive amp, with either Alessandro MS-1 or Sennheiser HD595 headphones depending how saucy I'm feeling. Qnect 2 cables again, and an optical toslink that came with the Beresford. I've got a big-ass Grado extension cable that's 4 metres long so I can go and wig-out on the landing with headphones on.