get something smaller (example ninja 500 or 250) then sell it in a year or two when you want to upgrade. there is ALWAYS a market for starter bikes and resale value is pretty good on them too. you can sell them for nearly what you paid for them, provided you dont destroy it.
buy it used. you will most likely drop it at one point or another. also, its going to drop significantly in value as soon as you ride it off the lot if you buy new.
supersports are not beginner bikes, just like a ferrari is not a car that you would use to teach someone to drive, or an f-16 is not what you train beginner pilots in.
supersports do make great second and third bikes though.
the purpose of your first bike should be to allow you to master riding skills and build confidence. you dont grow into a bike, you develop your skills on it.
as a beginner, you are going to make mistakes. you want something that is going to be forgiving. if you whack the throttle a little too much on a 250, its going to be much more forgiving than if you do it on a supersport.
you can say "oh just take it easy and you will be fine". thats like saying "im gonna learn to juggle, and im going to start juggling chainsaws, but its cool... im gonna go slow and respect the power of the chainsaw".
the problem is that, as a beginner, you dont have the proper skills yet.
yes, there are people who started on supersports and turned out just fine. there are also a lot of people who didnt turn out fine.
yes, you can die on a 250 just as you can die on a supersport, or a harley or whatever. riding any motorcycle on the street is risky business.
in the long run, you will learn much more and be a better rider overall by starting out on something smaller and working your way up.
good beginner bikes IMO that are still sporty
honda, F2, F3, 599
kawasaki: ninja 250, 500, 650r maybe older zx6 or zzr600
suzuki: gs500, katana 600, sv650
yamaha early 90s yzf600r
also, take the MSF course and ALWAYS WEAR YOUR GEAR