All I can say is that I sure do miss my CAV. A ski boat (for family fun) and other family vehicles in the garage just meant there wasn't enough room in there for a lightly-used vehicle not capable of doing school runs and such.
In my 7 years of owning the car I was uniformly impressed with the build quality and engineering smarts and detail. On other more mass-produced exotic cars I've owned there have inevitably been a few "what in the hell were they thinking?" moments in the course of maintenance and repair of the car...but not with the CAV. Everything is nicely placed/mounted, reasonably accessible, robust, finely engineered and durable, easy to work on, etc.
No doubt there are several very high quality manufacturers of GT40s replicas - RCR, Superformance, etc. The only one I have first hand experience with is CAV however, and I was highly impressed. The only car I have which is of higher quality is my RR Corniche...as it should be at $190,000 in 1983 when it was new (ouch). I'll be back into a GT40 replica before too long and I'll certainly keep my eye out for a CAV.