Where did you sink the most cash into?


I'm not interested in how much anyone  spent, but I'm curious what the single most costly item in your system is- ie, amplifier, CD player, etc.

I will go first- in my present set up, it's speakers. 

But I can't live without my ancient Zerostat (the red one) which was probably 1/3 if what they retail for now. My most enduring audio purchase!  
128x128zavato
Stillpoints under everything, including an ess rack.

But the speakers would be the most expensive if I purchased them new.
The only surprise I have in the responses is that for a few, cabling has been the single biggest expense. 

In my system, I've probably put less but close to 10% for wire but my results are a bit skewed because I've built some of the power cords I use and I also built one of my IC's
Room by a large margin

TT (Table, arm, cartridge a tie)
Phono preamp (close second)
amps
speaker
cables
preamp linestage

This little exercise shows me how overpriced cables are even as crucial as they are to a system.   For me, once I got my source right it made fitting in the pieces downstream easier.

I have an 800.00 power cable on my 2750.00 amp. Well worth the quality in sound. I think about 3000.00 on all cords/cables in my about 15000.00 system.