Wellll, I've done both, and I find the W650 to be a terrific all-round bike. A couple of years ago, Motorcycle Consumer news, CW, and I liked it better than the Triumph. There are (obviously) various places to get parts for it, too.
On the other hand, scaring yourself with brute force is fun, too. ( I just got tired of it on a day-to-day basis).
I'd say go for the Harley and get it out of your system. Sounds like that's what you really want, anyway. Just make sure you won't have any unpleasant surprises...