Moving up the Shindo line of products

[lowens]

I currently own mid level shindo amp, preamp, auditorium speaker cables, shindo interconnect along with the new Devore O96's.(thanks Matt)
I often wonder just how far up the shindo line of products I wish to go. At what point do you say this is enough? My current system is very, very nice and I really enjoy listening to it but I often wonder what the incremental benefit of owning say a VR preamp would do to my system and further enhance my enjoyment. Is it really worth the extra $10k differential or would the funds be better spend elsewhere? Should I just try to maximize what I currently have by improving the room acoustics, tuning the system, etc? Any thoughts?