I love this little system! My first advice would be that if it currently invokes an emotional response within the listener, don't mess with it. However, if you need or long for a deeper connection, there are a couple of things you can do that will stick with you regardless of the other components you ultimately choose. The Mr. T, the Arome CD, and Shindo IC's all are no-brainers, IMHO. The great thing about all of them is you can continue to use them throughout your future upgrades. They 're rarely seen on the used market and are always in demand.
Just a couple of cents from a guys who was in your shoes 6 years ago. Here's a link to my current system...
AudiogoN Forums: Shindo in the big room!
Take care in between!