I don't think you need a lot more power than you have. Are you hearing any distortion at typical high SPL levels and do you like to crank it often or do you play bass heavy stuff a lot?
Those are all nice high quality drivers in your speakers (the Sonata III's are excellent value for awesome sound, IMHO). they could certainly take more juice but the question is really more down to whether your ears demand it?
I could not find an impedance plot but an unusually low impedance or sharp drops might be the best indication that you might benefit from doubling or tripling your power. On a smooth impedance load at 93 db sensitivity my guess is you don't need more power.
Those are all nice high quality drivers in your speakers (the Sonata III's are excellent value for awesome sound, IMHO). they could certainly take more juice but the question is really more down to whether your ears demand it?
I could not find an impedance plot but an unusually low impedance or sharp drops might be the best indication that you might benefit from doubling or tripling your power. On a smooth impedance load at 93 db sensitivity my guess is you don't need more power.