Everytime a thread like this comes up, I always say/think the same thing. When you step back and look at the bikes offered, the difference in them is usually so minimal not one of "us" "regular" street riders can really tell the difference.
Read the reviews from the magazines and you'll see there isn't much of a difference between the bikes, so it really comes down to getting the bike you like best. You can't go wrong with any late model sport bike.
Here are some websites where you can get more info, but it doesn't look like they've done the head to head 07 sport bike comparo yet? If they have, someone post up a link
Bike Tests - Motorcycle Tests, Motorcycle Shootouts, Bike Reviews and Comparisons
2007 Sport Bikes | Suzuki Motorcycles, Yamaha, Kawasaki, Triumph & Honda Motorcycles - Sport Rider Magazine