Processor - $4k
Amp - $2.5k
Speakers mains (used) $4.5k - retail $8k
Sub (used) $2k including amp and EQ - retail $9k
Center - (used) $400 - retail $1200
Surrounds - (used) $450 - retail - $1100
CD/DVD Player - N/A - came with my video scaler and is a modded Panny with SDI output - prior to that, I had a $250 Pioneer with modded clock and modded D/A - probably $800 total
Cables - approx $400 for 4 38' balanced cables, 5 sets speaker cables, digital audio, misc interconnects
As you can see % is difficult to say. If you want to go on retail, then my speakers are maybe 2/3 to speakers (but that is 5 channels PLUS sub PLUS separate sub amp and sub EQ). If you go by what I paid, then it's WAY less than 50% for speakers.