Best return for the money, system upgrade suggestions please.


Hello!
I have managed to save some money that I do not intend to use to pay down student loans! I managed to save almost 2K and would like some advice as to where the money would be best spent. Here is my system below, thanks!

Amp - Integrated Krell Vanguard
Speakers - Sonus Faber Electa's
CDP - Cambridge AZURE 840C
SACD - Sony SCD C2000ES
DAC - Cambridge DacMagic Plus with BT dongle
Tuner - Luxman T117
Speaker Cable - Audioquest Type 4
IC's - Kimber Silver Streak throughout
Dedicated/Isolated 20 amp AC line with a PS Audio outlet
grm
I suggest that you audition the new ADD-Powr ElectraClear or Symphony made by Coherence Systems. They are designed by the founder of Quantum Products and QRT from many years ago.
These amazing and affordable power conditioning/harmonizing devices will take your system's sound quality to new heights, I promise you. 
A second subwoofer or some kind of decorative room treatments and or bass traps.  With 2K you could do both! 
Unless your room is already done, 100% acoustic treatments! Check out GIK Acoustics stuff. No gear upgrade can match the sound per dollar spent on acoustics. Next would be speaker placement (free!)
I agree with previous posters- pay down your debt, but since you are intent on buying something (I've done the same thing long ago...), my 2c is to invest in room treatments like already suggested. I'm using Primacoustic and couldn't be happier. Remember, the room will give you 50% of what you will (or won't) hear. Best bang for the buck is room treatment.

Tom