I have a hyper bike, and it's GREAT fun. But it's really only for the track. It's too sick for the roads, I use 10% of what it can do 10% of the time, and it's waste.
The 250 I used 100% of 100% of the time, and found it to be a perfect bike for my riding. And by riding a bike that was within my skill range, I was making younger friends on larger bikes look stupid.
ZX12R is NOT a track bike, it's a highway queen unless you're talking about drag. ZX12R
I rarely ride with people my age and have also come up with people who are 40+ in fact most sport bike riders I deal with are at least 30, I hate younger riders since they do very stupid things.
It's one thing to do stupid things handle it its another to push your limits day in and day out when you feel they're on the edge of hitting a tree every turn.
Come to think of it my Insurance ladies hubby is also in instructor, he doesn't even start people on 250s lol SV650 all the way.
All I'm saying is basing on how much you prise the 250, you must feel really good on the bike and that's why you like it so much, if my GSX-R1000 scared me or felt like it had too much power I too wouldn't want to ride often and would rather go back to a 600. but thats not the case, the 1K fits my needs and is an all around bike, it's hard to argue with doing 3K rpm on the highway VS the old 7K of my F4i for just keeping up with traffic, the 1K makes a great street bike and as does your 12R its a wonderful street bike, not the best on backroads but on the highways that thing is at home. I know a good bit of people who ride them long distance due to bike setup.
You should go check out a Z1000 or FZ1 I bet you'd like those bikes for street use, they have more of an upright seat like the 250, no doubt bigger, but they have an over all good sense of power/not gonna kill yourself ratio.
As I've said before, let me know when you're in the area I'd love to go riding with you. =)