Based on recommendations here, I've put in Shell Rotella T/T6 since I acquired the bike. I purchased my '06 with 1538 miles on it (I bought in in 2009 used, PO wasn't happy with it and traded it in for something different), and the dealer changed the oil once before I did. But starting around 3K miles, she's had Rotella T or T6 in her.
Keep in mind I've done some cold weather operation with this bike (below 32 degrees Farenheit), but after a nasty spill a couple of winters back I have adopted a 'no freezing weather' rule, as you never know when you might find a lone patch of ice... The Rotella T performed adequately at these low temps, although the bike took a little extra coaxing to start when cold (typical of what I've read here).
No issues so far. Shifts are smooth, especially after an oil change, and the bike isn't burning/losing any oil (haven't had to add any between oil changes). Cam pitting is 'typical', i.e. similar to what I've read/seen here on the forum; no deep pitting so far. One happy camper here!
When I hit the lottery or whatever, I still want to install SISF's torque cams, of course!