What would you upgrade next?

I am curious what you think I should upgrade next.

Pre/Pro: B&K Ref 30
AMP(main): McCormack DNA-2DLX
AMP(Surr): ATI 1506
SACD/DVD-D : Pioneer Elite 47A
SKR (main): Thiel CS6
SKR (CTR) : Thiel SCS3
SKR (Sur) : Thiel Powerplane inwall
SKR (Rear): B&W LM 1
Sub : Velodyne HGS 12

Cables:
Amp: PS Audio Mini Lab (power)
Amp: Straight Wire Blue Thunder (power)
SKR: Goertz MI3
IC: MIT 330 Plus II (Main)
IC: Cardas Natural Ref (SACD/DVD-A)
IC: Straight Wire (all other)
Other:
3 FIM dedicated 20amp outlets (each amp and rest)
Monster power 2500 line conditioner (amps not on)
GW Labs Jitter reduction/Upsampler