Yamaha FZ 25 is the powerfull bike but not powerfull as Duke 250 .Price is very high , about 1.6 lacks ownwards . But my main reasion to dislike this bike is its missing ABS system. Even Dominor 400 have duel channel ABS with slipper clutch technology to smoothen your ride on cornes. May be Fz 25 have slipper clutch but thats not enough.
Todays date ABS is very important in every bike to decrease the risk of accident in any type of biking condition . Otherwise the bike is powerfull enough . Its 250cc engine delivers max power when combine with its 5 speed gear box . So hence if ABS is not important for you then FZ 25 is the great choice.