The fun of touring is the adventure and freedom of it. Part of that is not worrying about the bike. I'd:

Buy a LHT with a great build.
Go for baroque on the things that actually can make a tour nicer (clothes, tent, etc.)

Buy a custom steel or Ti roadie for cruising around town, and let that be the high $ item.

Of course, if I was Sheik of Saudi Arabia I'd probably have a copy of the Bruce Gordon bike from this year's NAHBs for touring