Adding a Herron VTSP 3A/360 Preamplifier to the system.

Awesome! It looks like an extremely nice unit. I love the very clean looking faceplates of the Herron gear. What finish you get? The titanium looks sweet (I had a VTPH-2A in that finish, now sold to a good friend). As I'm sure you know, preamp contributes a ton to the sonic fabric of a system. 

Muleving, this one is the silver finish. It is one of the first VTSP units made, and has six tubes rather than four. I don't know what possesed me to buy it, just perusing the tube amps and preamps, but when I saw the Herron, I had to have it.

I'm hoping for a positive transformation, if it's anythiing like when I went from the Transcendent Sounds to the Modwright, it's going to be huge.

I assume you bought the one that was here on Audiogon last week or so? 

I recently bought a pair of Herron monoblocks and am impressed with them, so I then bought one of his SS preamps, a used HL-1 built ~ 2005. I like the build and function of the HL-1, and it sounds good but I can't help to think one of his newer tubed units would sound that much better. Let us know how you like the  VTSP 3A/360.