Obviously you should be looking for an old VFR, an SV650, or a Concourse.
Seriously, I would look for a 600 cc standard for a re-entry bike. They don't have the ridiculous powerband (or lack thereof) of the newest 600's, they won't have as much plastic to replace when you drop it, and they are more comfortable than the newest bikes also.
Of course, if you're looking for a cruiser type bike, you might like one of the middle weight Japanese cruisers like the Yamaha Virago 650, or similar. The smaller ones are just that - smaller, lighter, less traumatic when you drop them the first time, etc...
In closing, I recommend a 600 cc standard or older model sporty bike (Suzuki SV650, Suzuki Bandit, Kawasaki ZZR-600, Yamaha YZF600R, etc) if you're looking for something sporty-ish. Plus, a standard will give you the opportunity to decide what type of bike you really want. (Sport bikes look neat, but they aren't what everyone really wants deep down inside.) Or a small displacement cruiser (Yamaha Virago 650, Kawasaki Vulcan 500) if that's the kind of riding you want to do. No matter what you do, enjoy the ride.
"Remember, it's always easier to do things the hard way." Chango