They'll still be available in a year. I'd hold off unless someone offers you a genuinely amazing price which we both know ain't gonna happen. Trade in the 959 if they do, you can't use both.
Why not look back at the bikes that were truly legendary and buy those? Hayabusa, S1000rr, H2. Anything brand new won't be different enough to warrant the cost. If it is, buy it in a few years after you know for a fact it really was/is a great bike.
No bike is going to make you ride that much differently. Since you can keep buying bikes, buy bikes that have meaning. Strive to have an eclectic repertoire instead of all close to the same. The Ducati was a step in the right direction but you have 3 other liter bikes that fill the same niche. In fact you have 4. You haven't added the Repsol to your signature yet!!
Dump a repeat and look for something really unique if you want another bike. I think jumping at anything as soon as it comes out is too likely to result in a repeat experience. Look for "different" not "better." There are some bikes that are unique but not many that are better.
Two years from now Ducati will have something better. If it's truly better performance you want, look into the aftermarket and you will outpace the factory bikes a lot better than buying new bikes. Short of power adders which you are not into, I don't think aftermarket parts and various other mods are going to make a huge difference so I know factory bikes won't either. There's no denying, modded bikes are better than factory but not that much better
'08 MIDNIGHT SAPPHIRE BLUE Now Deceased