first off, corrado's are cool cars. i had a 92 vr6, red, winter package, no leather bbs's (which look nice clean, but never are, i wish i had the 93-4 speedlines). i loved the thing. now that my mechanic and i have become good friends, he talked me into a honda (well acura integra). i don't see him as much now, and i noticed he sold his mercedes...
anyway, to the topic. i'd like to break this up a bit.
first thing. at 19, do you
own your car, or is it in a parent's name and insurance in anyway (i know a lot of young people get mad at that question, but hell, i did it until speeding tickets came). if the anser is yes, you need to find out if their insurance will write a bike on that policy or discount appropriately. otherwise, unless you pay cash and fix your own crash damage, a new 6r (or any 600 supersport) is likely a dead issue already. i know in 91 (19 at the time), no tickets, full coverage for a new gsx-r750, stand alone policy would have cost $3600/yr. the bike was like $6600 to purchase. the 600's weren't much cheaper, i think it was like $3300 for $5700 f2. and i live in a low-risk insurance area. just to put it into perspective, the insurance payments would have been A LOT more than the bike payment.
now buying a used bike takes a big chunk off of that insurance hit. also, buying a smaller displacement bike helps.
second thing. what do you want to do with it? if you pick a goal that you want a motorcycle to do, there's a bike out there that will do your top priority best. for example, when i bought my first sportbike, i had some street time on a standard. what i was looking for was a bike that would be able to do sportbike things (great handling, fast, good looking), but i wanted to do the things i learned to love with my standard, like sport touring, taking the bike to work and school, taking girls out, riding to places i've never been. at that time the 750's i loved so much were torture racks, so they didn't fit into what i wanted. i went for a cbr600f2. the zx6e probably would have done a better job, but the f2 had more poser value (i.e. it was faster). the ex500, katana's and few others bikes may have been better choices, but i did love my f2. and honestly, if work didn't get in the way of my sport touring schedule, i would probably still have it. or maybe i a futura, but anyway...
third thing. have you looked anywhere else besides kawasaki? they do have the BEST starter bikes that fit into the sportbike catagory. though, a street and trail bike is a million times better for learning (unless you're short). anyway, honda, suzuki, and yamaha have some good choices too. i've owned 4 streetbikes, one from each of the big-4 japanese makes. they are all good bikes. my kawi and yamaha were both older. and both have given my regular wear issues. the honda wasn't as dependable i thought it should be. not bad, just surprised. the suzuki is more dependable than people say it should be (but i did change the infamous shift shaft on it).
and last, a motorcycle's perform means very little to a new rider. most new riders can ride smaller, slower, more conservative motorcycles faster than they can the last, greatest, plastic fantastic.