Best return for the money, system upgrade suggestions please.

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
I like Michael Green’s suggestion.

A streamer plus a Tidal subscription is another good option.  So much music to explore for such a small investment.
Room acoustics can cost from $0.00 to $100k and up. I suggest zero for now, there is a lot that can be done with books, plants, moving furniture, curtains, rugs and carpets. I am getting tired of this stupid self-advertising by some.
I would upgrade speaker cables first and get couple of decent power cords, not necessarily spend all the amount you have. This would complete the amp/speakers/speaker cables unit for the time being..
Hi inna4,
Thanks for the suggestions! The only room acoustic problem I believe to  have at the moment is when the music is turned up, all of the pictures on the walls really rattle, it's caused by my Sub. All of my power cords are by Nordost and seem to do quite well.

What Speaker cables would you recommend?

P.S I have a premium subscription with TIDAL and I love it!

Thank you!
grm, I can't be sure but since you have Kimber interconnects you might want to try Kimber speaker cables first, unless you feel that you may not like your interconnects.
Besides, very long time ago I tried those Audioquests 4 and they were terrible.
How do you use the cambridge Dacmajic plus. Of your active components it seems to me that it is the weakest link. Does the Cambridge Azure CD player have digital inputs?