The Dunlop Q2 is an amazing tire, I put one through the ringer all day today at the track on my liter bike and once again I was impressed. If performance riding is your thing then look no further. If a Q2 doesn't have enough grip for you, your either doing something wrong or a very fast rider. I'll continue to run the Q2 on the busa as long as I'm running them at the track because while riding at the track I'll wear sides worn out well before the center. However the next set of tires that aren't hand me downs I'll be going with a Q2 front and a Roadsmart rear or mabye a Bridgestone BT16 front with a BT23 rear. I've heard alot of positive feed back running hypersport fronts with sport touring rears.
How many miles do you drive a year? If your only doing 4k a year and your trips are fairly short I would probably stick with the Q2s because one set should last you an entire season or close to it. If you do longer hauls and/or can't afford to swap tires out every 4k miles or so you might want to think about something a little more touring orientated.