I'm about to do the same mods that fatboy has just completed. I'd probably look at a Zippers 120 but I like the idea of keeping *something* from the original, and to be honest, not everyone needs (or wants) 500ci under the tank...lol.
As for the customs, EAGLE1, I used to own a $50,000 Bourget Low Blow, 120ci HO Merch, stump-pulling power, tons of nice parts, bathed in chrome, etc. Nice bike, but NOT a Harley.
Those customs aren't for everyone either.
There's something about having "1HD1" in the VIN that makes a difference to a MAJORITY of the potential resale market. Not many people buy used customs, take my word for it.