I'm having a custom 7 built.
I'd say try to check out some of your local luthiers.
Don't just head over to a bigger company as they will often overcharge for the work they do, or should I say you won't get as much for your money.
You will also find with a local guy you can build a good 2-way relationship (if he's a nice guy) you can visit him 1-to-1 and talk, see/inspect some of his previous work to decide for yourself if it's of a standard you are looking for and pay a visit for updates on how things are going, which in turn gives you the chance to say "well, I'd like this bit to do this...look like this etc..." you see your work in progress, as opposed to just viewing a final product.
This means you are dealing with a man/woman and not an internet browser/phone/email.
Add to this that you are helping the local guy in your area which is also a very good thing.
He may have a little more trouble sourcing parts than a bigger company, but you can always come here to get a good deal on any parts you need.
Let me just add that I don't know much about the companies mentioned so I could be underestimating their relationship's with the customer.
Give it some thought.