Just a few thoughts, Street:
1. I can't see putting anything Starfleet onto a "fast destroyer" template. Even if they do call it something else, Starfleet of the TNG era would never make anything a "destroyer." At the outside, you could conceivably use the idea that the ship was based on a heavy cruiser template (see Monty's description of the class on 5/11). More likely, the ship would be a specialized hull, probably considered a larger surveyor.
2. I was the one who suggested a diplomatic courier. Monty's original idea was that the Tolkien is a science vessel.
3. Monty stated that he wanted the Tolkien to be the first ship to incorporate a Binar-designed computer system. That would make the ship's initial launch date around 2366-2369.
4. Now, this is just a personal opinion, but I don't like to give top-of-the-line weapons to second-line ships, especially purely science and diplomatic vessels. They require defensive capabilities, sure, but are designed to never be put into a situation where a Phaser X would make a difference over a Phaser VIII.
5. Where did you get four transporter systems? Did you intend to put only the standard complement of transporters (3 each), or did you spend the space to get another allotment of units (which would give you 6 each)?
I didn't count space on the design, but, it looks like a pretty decent destroyer for the private fleet of a civilian aristocrat.
Davy Jones
"Frightened? My dear, you are looking at a man who has laughed in the face of death, sneered at doom, and chuckled at catastrophe! I was petrified."
-- The Wizard of Oz