The T30 is Bridgestone's competitor to the Roadsmart 2, yes. However the people I know who have tried it say it's not as good. If you want that *type* of tire (Sport touring tires) then you should be looking at either the Michelin Pilot Road 4 (which supposedly is the new benchmark), the Dunlop Roadsmart 2, and the Pirelli Angel GT. The Pirelli is a bit different from the others in that it focuses a little bit less on the "sport" side of sport touring and more on the "touring." Unless you're on a very tight budget (in which case you should be looking at the Bridgestone BT-023, it's the best value of this market segment and still pretty damn good), you should only be looking at those 3.
The Q3 you mentioned is a completely different market segment called a Hypersport tire. These tires are made for people who spent a good amount of time at the racetrack and are willing to sacrifice in areas like mileage and wet weather performance to reach a level of grip you can really only take advantage of when pushing it as hard as you might at the racetrack. If you want that then go ahead and get it, just understand that unless you push your bike insanely hard in corners you won't get anything from it you can't also get from a good sport touring tire while getting a LOT better mileage.