I suggest going to a dealership and riding one. Better bring your wallet though, there is very good likelihood you will want to take one home. I've had several bikes, from Harleys to Choppers. I went and drove this after testing an Indian Scout (Nice Bike) but I was immediately sold on the Triumph. It just felt better to me.
Coming from a bike that has endless aftermarket options, I think your only issue would be lack of available aftermarket parts. Eventually I'm sure there will be plenty, but the bike is still new, so not many vendors are making parts yet. Fortunately, relative to performance, not much is needed. The bike sounds pretty good stock, but coming from a Harley, you may want a little more rumble.
I've been in contact with several exhaust manufacturers. Most have something on the drawing board, but it may be 6 months or so before we see considerable options.