Dizzy: I was referring to LC Amaral's U.S.S. James T. Kirk (an Atolm design) which he made for BC and was recently converted to SFC by DarkDrone. It should still be on sfc3files.com. I had started my own version a year ago that never got finished and found the remnants of it to use for parts. The Merlin hardly has any resemblance at all to the Kirk and I modified the engines to make them more distinctive.
The impulse engines clear the warp nacelles from all angles, unlike Enterprise-B based ships that have the impulse exhaust flowing right into the bussards (which incidentally, also don't clear the saucer making them relatively useless).
Also, as stated already, the Merlin doesn't have arrays but 'rail phasers'. The phaser emitters move along the track, increasing their firing arcs. TNG arrays are the next logical step since instead of moving the emitter, they 'move' the beam. The registry number and technology set the ship after the Excelsior. X-Ships have always struck me as being in the gray-area of design lineage. Starfleet probably wouldn't design a totally brand new ship just to test out their X-tech so they would've borrowed from pre-established designs to reduce the production costs (and to cut losses should the new tech turn out to be a flop).
Dawntreader: Yeah, feel free to use it in your sig.
Marauth: As I'm so fond of saying, you'd be surprised what I have stashed away on my HD...