I just saw this thread but are you seriously considering a Charvel custom shop?
Read my post on the Jackson Kelly thread about the shitshow dumpster fire that became of the Jackson Charvel custom shop.
Now if you find an already made custom shop Charvel that's ready to go and you like it, awesome.

Get it especially if you can play before you buy and like it.
Now if you want to pay and wait you're going to get fucked, I won't mince words here. Their Ebony is no longer black anymore and they bleach their maple so you won't see the grain in it anymore.
Their order system is best described as draconian. The "rules" for the custom shop order are best described as... well... Draconian. Let me give you an example. My custom Charvel Strat showed up with backbow so bad that the strings were resting on the frets, no fret buzz they were literally laying on the frets. After numerous warranty services which left the guitar with action so high to be playable in the middle of the neck you could slide two Dunlop Large pics into I finally got them to agree to take the guitar back to the CS so they could "look at it". I told them I would be happy with a new neck that was standard maple instead of Birdseye maple because I believe that made the neck so flexible to weather.
So long story short they would not give me a new neck in standard maple because it was against the "rules" if it had to new neck it had to be Birdseye as well, even though I said I didn't care or want a refund in the cost difference. When I got the guitar back they milled the fretboard and refretted it to get it "level" so if you look at the side of the neck you can see that the fretboard slab was thicker at then ends and thinner in the middle.
It probably cost them more to go through all this then to just replace the neck with solid maple like I asked but you know "rules".
Also you can't speak with the builders directly like you could in the 80's and 90's every little thing has to be done with the dealer. Imagine playing the game of telephone with a 5k custom shop guitar. That's what you are doing with a custom shop Charvel.
Hope this info helps.