I started my system a while back and at the minute this is how it sits
I have...
Audiolab 8200cdq which is my CD player, dac and pre amp
Emotiva XPA-2 imported this monster amp from the good old US, absolute brute
Monitor Audio RX8s for main speakers
BK Electronics XLS400 subwoofer which I got due to some really high recommendations
All bi wired with some Chord Epic speaker cable
Got some Chord power cables and XLR's too but they are just their basic range.
Normally play music on CDs as this gives me best quality at the min, but I also have an ATV connected so I can stream music from the phone or iPad etc with Spotify which is handy from time to time
My next upgrade is to change the Monitor Audios for some Bowers and Wilkins CM9s but not for a while yet