Middleweight fight: Yamaha YZF R6 vs MV Agusta F3 675 vs Triumph Daytona 675 Triple vs Honda CBR600RR vs Kawasaki Ninja ZX-6R
These 600-ish cc bikes pack a lot of punch, nimbler in the twisties than their big brother counterparts, and lighter in the pocketbook. Multiple votes allowed on this one.