To date it's U.S. R80a (SCV $12,500). I never thought I'd find one that was (1) actually genuine, (2) aesthetically pleasing, (3) with a clear handstamp cancel, and most importantly (4) at a price point I could afford. I've passed on several more expensive examples that weren't as nice.
The ownly downside is it being cut just into the frameline at top... but that top margin probably saved me about $3,000.
I'm perfectly happy with it.