Hmm, well this is interesting input, thanks all.
I weigh 180 lbs. It is 2003 919.
I have gone through a few suspension upgrades, first with rebuilt front forks (0.9 kg/mm linear springs with 5W oil, setup by Catalyst Reaction), then adding a Ohlins rear (no external reservoir), 1000 lb. spring. They have checked it out a couple times, checking for stiction and are saying it is working well. They have also checked the front headset and say it is okay. Overall the suspension is not perfect, but it is 1000% better--as far as being a compromise of small bump absorption and stability in turns.
I think one variable may be the roads I like around here, where there are many tight low speed turns, really fun, but I am taking them at 25-35 mph and having to throw the bike side-to-side a lot. Here was part of my route on sunday: https://goo.gl/maps/N8bKGR3PDF12
. I think there may be riders that go out of there way to avoid roads like this, and call them 'goat trails' but it's what I enjoy.
I am definitely not pushing the limits of grip and the biggest safety factor is sand and dirt on the road in blind corners.
I have had mostly lighter bikes (a ninja 250 for a couple years), although my Honda cx500 was the bike I spent the most miles on, and it weighed almost as much as the 919--but it was also on a 130mm rear tire, and felt very nimble on these roads.
I was think of switching to more of a sport touring compound, think of the Angel ST, but there are some nice sportier tires out there for cheap, I love continentals and there is a rear sport attack for $120, and the Bridgestone S20 Evo is also very inexpensive and gets great reviews.
The 2CT looks like it has a very pointy profile and would turn-in quickly, but at lower pressures (30/33) the bike doesn't feel that way to me--but I think it is all relative to what I've ridden. Feeling the tire, it certainly feels like a super sticky compound for sure.