I think they are great bows as well. The Martin Hunter is one of my all time favorite bows. Martin will do some custom work for you, but they are not as custom as a Widow as was stated earlier. BW will do most anything that any custom builder will do, you just have to ask.
I often think about another Martin hunter with all grey actionwood riser and black glass limbs. I do think there are better bows out there for the money though. Martin's prices have really skyrocketed the last few years. You may be able to get some good deals on them, but I'm not sure where. I'm going based on the prices I see from the more prominent dealers.
Check out the classifieds here, lots of great deals...Mike