It all depends on what you want ..............
Mike --
Trackdays and very fast , one up road riding - with not a care for longevity ? Then opt for Bridgestone BT014s , awesome feedback and grip but unlikely to last even 2,000 miles and they do not appreciate luggage and pillions !
Same as above but fewer track days and half as much again tyre life ? Then go for Bridgestone BT012s
General touring , occasional fast road riding , with and without pillion , plus the odd track day ? - Then Bridgestone BT020s , very good all round performance , wet and dry , but lacking the levels of grip of the BT010 .
Lots of track days , fast road riding including with pillion and full luggage , Nurburgring , wet & dry and still able to laugh at your puny attempts to find it's limits ? Then Bridgestone BT010s are the ones to go for , perhaps the best all round compromise - and remember they are all compromises !
But , BEWARE , BT010s are brilliant but if you put them through too many full heat cycles ( e.g. lapping the GP circuit at Nurburg after two days on the 'Ring) , they WILL eventually give up the uneven struggle and let go . Warning signs are very very small slides , or a shiny appearance to the tyre when allowed to cool fully . If you see this it's best to have a new set of tyres asap , certainly do not ride in the wet with them in that state .
I'm told by those who know a lot more about tyres than I , that all tyres will do this if you ask too much of them outside their design parameters - so the above holds true for all the others mentioned , but could be expected to happen sooner , if you took them on track too often .
Me ? I've a set of BT010s for everyday and a set of BT014s for track days without a pillion , after all there has to be some advantage to being a B.O.F. !
All the best ,
James