I've seen and sat in the Titan built by Ivan Cambell; I've flown the Tiger replica he built and I use one of his helmets. His build quality is superb.
When I was there in November, he had four or five T-51's under construction for customers. I can't remember the pricing but if I was seriously thinking of getting a warbird scale replica I would get him to build one for me. I'm quite tempted by the 90% scale Spitfire he's building - put a GM V8 in it and it should go quite well.
Funnily enough, before flying his Tiger Moth replica I thought, "why would you bother with a replica?". After flying it, and going on to fly the real thing, I'm inclined to think, "why would you want the hassle of the real thing?"