If you're getting a full barrel, I'd think .685, just because of the versatility. However, there is a lot of small paint out there... If I were getting a full barrel, I'd go with the .685, but add the wedgits, or use an additional breach sizer, like one from Lapco. I have a .676 sizer that I sometimes use with an old POS cocker barrel that has an ID somewhere in the .7 range (I kid you not...) that works surprisingly well in terms of both accuracy and efficiency. It's just loud as hell, not being ported.
And since you asked, and I can't get it out of my head:
I'm all dressed up with nowhere to go
Walkin' with a dead man over my shoulder
Waiting for an invitation to arrive
Goin' to a party where no one's still alive
I was struck by lighting
Walkin' down the street
I was hit by something last night in my sleep
It's a dead man's party
Who could ask for more
Everybody's comin', leave your body at the door
Leave your body and soul at the door . . .
(Don't run away it's only me)
All dressed up with nowhere to go
Walkin' with a dead man
Waitin' for an invitation to arrive
With a dead man . . . Dead Man . . .
Got my best suit and my tie
Shiny silver dollar on either eye
I hear the chauffeur comin' to the door
Says there's room for maybe just one more . . .
Don't run away it's only me
Don't be afraid of what you can't see
Don't run away it's only me . . .
To die for an idea; it is unquestionably noble. But how much nobler it would be if men died for ideas that were true?- H.L. Mencken