6'-5", 230 lbs, eh? Mostly, it's great to be tall, but there's no added value in being a big guy when you're looking for a bike that fits.
Here's my votes.
-Yamaha FZ1. Great all around bike, goes like stink, handles very well for real-world use. Heck, it handles pretty well at the track; BIKE magazine ran it around Bruntingthorpe (there's a Brit name for ya) track as fast as the sport 600's. Relatively tall seat, and seat-to-peg dimensions. Good two-up. Given its versatility and performance, it's an INCREDIBLE bargain. You can buy a brand new one here in Seattle for $7900.
-Honda CB1. They haven't made it for ten years, but this was a good bike for a tall guy. It's a naked, though, and I think the FZ1 is more versatile because it comes with a half-fairing.
-BMW R1200GS. Ok, ok, I know it's not a sport bike. But it is a terrific tool; good handling, rediculously durable, great dealer support, and best of all a nice tall seat, generous seat-to-peg, and a screen. It has very cool expandable hard luggage (I checked this out a couple of weeks ago and man, it's the dog's. The luggage lids telescope in and out). It is kind of a grown-up bike (only you know how that makes you feel). Good choice if you have excess cash and need something useful to spend it on, because a 1200GS is going to go 15 large.
An earlier poster suggested the ZRX1200. I think that its ergos are too small for you. They fit me pretty nice, and I'm Loris Capirossa sized; you're gonna hate it.
Whatever you buy, you should have the suspension retuned (it's no big deal) for your weight. Stiffer fork springs, maybe revalve the rear shock. Any good shop can do this for you.