The best advice is found in the links below. And don't listen to the clown telling you to buy a GSXR.The smallest gixxer in your market is 600cc, which is not a beginner bike.
I am 6'3 180 and my first sports bike is a Yamaha R6. I absolutely love it. Its large enough that i dont look funny riding which you may get with the smaller bikes such as the 250. Its alot of fun and i highly recommend it.
normally i would suggest the ninja 250r but you being 6'3" 230 id say the 600 would be able to actually move you lol. my first sports bike was a ninja 250r but i was 5'7" and only weighed 130 so it took of fast any way