Wow! DH is ready to spring for a Seven? Lucky girl. My DH just got a Seven this spring (road bike) and it's a lovely thing and perfect for him. However, it was like his sixth or seventh road bike and his body proportions are not like the average male and he had trouble fitting any other bikes without some sort of comfort issue. Personally, I'd be leary of jumping to full custom until I REALLY knew what I wanted in a bike, but that's just me being extremely nervous about dropping that kind of money without knowing absolutely for sure it was gonna work like a dream. There are some aspects of fit that can be tweaked after it's built, but there are going to be things like the stiffness of the ride that can't be changed.

Go out and test lots of bikes. You may find one that fits like a dream. Have fun with your search and keep us posted.