A pair of my riding buddies have them, and they are nice. I'd consider the Versys to be a close second to the DL650. However, the Strom is definitely superior in several real-world areas.
The May 2008 edition of 'Sport Rider' magazine has a shoot-out article between the BMW F800S, the Versys, and the 650 V-Strom. The Strom won the shootout.
Here's some quotes from the Sport Rider test article...
The DL650 eked out the top spot over the Versys by dint of it's smoother, easy-to-use, and more responsive V-twin engine and more polished all-round package.
The dyno graphs don't take partial throttle response into account, which is where the two Japanese twins excel-especially the V-Strom, with it's torquey V-twin powerplant that offers better acceleration with less throttle movement. And yet the Suzuki's flat torque curve makes doling out the right amount of power while dealing with the physical actions of cornering easier than the other two vertical twins.
Even though the Kawasaki feels peppier because of it's lighter weight, it's torque curve peaks later than the V-Strom and then drops off drastically after 7000 rpm; this means you actually end up shifting more with the Versys in order to maintain acceleration compared with the Suzuki.
The V-Strom also took top honors for fuel range, comfort, stability, and wind protection.
That being said, the Versys should not be ruled out. As an urban blaster, with weekend rides in the twisty stuff, it may be a slightly better bike than the Strom. But if long-distance riding and/or occasional dirt road use are part of your riding mix, stick with the baby Strom.
Here's some photos of my Versys riding buddies, and their bikes...