Getting late, but I don't think you'll have a bad sounding guitar, specially if you to with Feline, Wez, Bob: Guys that have the real love to the instruments and will search good woods to use on it...
If you were in Brazil, I'd say that going custom perhaps wouldn't be the best way, I know some luthiers here that pay attention only to the price of the wood, not search something A+++... Some of it because of that brazilians are really cheap, usually... But I've seen some guys using Hard Maple on guitar tops just because it was easier to get than Soft Maple and many, many more things even worse...
I feel a completely different way of think on UK's luthiers... They really wear the "no compromise" belief...
I think you know you have all the plan on your head but you're affraid of pull the trigger... But I do really think you'd do good going custom... You would get a light guitar, with the neck profile that you want with all your options... Can't go really wrong on it, you're not a 18years old guy changing ALL the likes and dislikes soon ;)
Sorry for the wordy post