PVA,
I'm a bit late in on this thread, so I apologise if I'm going over old ground here. Good on you for considering a two-wheel option for transport. Bikes are immense fun, and going fast on one is a completely different sensation to going fast in a car. Note: I didn't say *better*, just *different*. Um - very different. Best description I heard from someone is that "They warp time."
I started on a ZZ-R250, did 12 months on it then graduated to my open class and a GSX-R750. Although the ZZ-R was pretty gutless as far as bikes go, it served it's purpose: roadcraft development. Riding as though everyone else is on a mission to punt you into the scenery becomes second nature after a couple of weeks. Don't spend mega-$ getting a "fast" 250, just get something harmless, do your 12 months, get all you can out of the experiences and then go the big bike. There is LIGHT YEARS between even an RGV250 and a big supersport. Power, handling, brakes, it's a different world. And you'll probably be able to sell your 250 for close to what you paid for it to the next learner on the block.
I did my open class with Alert Motorcycle school. I have no vested interest in them, btw, but they were an excellent crew and a couple of friends have used them as well for their 250 and open licenses. After 12 months on the 250, I had a 90 minute lesson on a CB400 then clean sheeted the exam immediately afterwards. Unfortunately I could not recommend my 250 license tutor, so I'll remain quiet on that score.
Have someone take a camera to your first test ride on a big bike after the 250 period. 99% of the people I know with bikes had the same look on their face and the same reaction - "I cracked it open and it tried to get out from underneath me."
Be careful, keep your eyes open and expect people to just do the most STUPID, UNBELIEVABLY MORONIC stuff. Indicate left and turn right is a favourite; as is looking you right in the eye and pulling straight out in front of you, then at the next set of lights claiming they didn't see a blue, white and dayglo-orange motorcycle with dichroic headlights on.
Also, be aware that most drivers simply have no idea how fast a supersports motorcycle (or a fast car, let's not discriminate) can accelerate. So they might do everything right and still find you occupying the roadspace they desire. When you can go from standstill to 100km/h in a tickle over 3 seconds, you can surprise the heck out of people. I know I have!
Good luck and Godspeed, young man!
Aitch.