a pre-amp around $4000 for my system

Without knowing what you're looking for in a preamp, all I can say is that I am very happy with my McIntosh C220, a tube/SS hybrid full-function preamp. List is ~$4K, used usually under $3K. I did replace the stock tubes with Mullard 12AX7 reissues, for about $80. Smooth, detailed, free of listening fatigue and wonderful soundstage width and hieght. I am thinking the system you listed might benefit from having some glass somewhere in the system, and the preamp is a great place to add it.

Get a TRL Dude and know you won't find a better sounding preamp for up to $20,000. This is a simply fantastic sounding gem that can bring sweet music like you have never heard in a component. Ya, I am a huge fan and owner.

Grannyring's right, there's a TRL for sale $3500.00 you won't regret it.