Re: Ceriatone Marshall Clones.
I just built up a Metroamp JTM-45. I'd check them out. The quality is incredible, the instructions and forum is well-developed with excellent photos/PDFs, and more Marshall experts on that forum than will fit in a clown car!
As far as the real vs. clone comp. Well, they spec trannies to match a variety of vintage samples, same goes for caps/resistors, etc. so I don't know how much closer you can get. Also, the nice thing is that you can do it yourself if you're so inclined.
The metro kit costs about 900 or so USD, and when you compare Scott's prices, maybe that's the way to go if you want a first class amp built up for you. If I didn't want to do it myself, I would have gone with a celtic.
If you're in the US, most ceriatone buyers will have the board shipped and hold off on the trannies (due to weight) and have a us amp tech install some Heyboers, MM, or whatever transformers you prefer.
Good luck!