a drag motor makes about 335hp and is nothing more than a factory ported 2.5 with an a13 ECU calibrated for a Brucato SVS intake, 26cc heads, which require 110 octane race fuel and a 15" midsection. As far as power to weight ratio, acceleration and rough water handling it's no comparison....I currently have boats with 2.5s and 300s. If you're not a hardcore performance boater who is not going to go offshore and bang the throttles in 4-6 footers and want good top end and idle quality the 300xs won't disappoint. But...they won't hang with a drag motor anywhere. Just ask Charlie Tesauro. He has lightened and ported 280 blocks which put out about the same power as stock drag motors and he runs 126 mph. The fact that they are called "drag" motors means that the ECUs, especially the 2001 and newer units, are calibrated for acceleration. If you did want the most bang for the buck and don't mind mixing drag motors are the ticket. I would open up the heads to 30ccs in order to run av gas which is a loss of only 4 hp on Diamond Marine's dyno and either richen up the ECU to 1.03 or better yet get a Brucato PCU which improves idle quality. Charlie runs his motors a bit rich as well and he has had them for about 5 years and no problems that I know about.