I think that you're looking at the wrong model of Suzuki's. Per Google, each of the OP's 2006 ETEC 250's weigh approximately 516-530 lbs depending on the model, shaft length and so forth. Comparatively, a brand new Suzuki DF200A weighs 531 lbs for the 25" shaft with the digital/fly by wire controls. Not sure if you're looking at the DF200T, which has the mechanical controls and weighs 606 lbs a piece for the 25" shaft version? Either way, I doubt the OP would feel much of any difference at all back there with the DF200A's weighing essentially the same as his current ETEC's.
To the OP... here's the thread from Skunk Boat on his repower, check it out.
Bye Bye Yamahas.... she is off to get Suzukis
Edit: In case you land here and don't want to read thru the whole thread, here is a summary...
Twin DF200APXW2 inline 4 cylinder 4 stroke 531 pounds each
Drive by wire.
http://www.suzukimarine.com/Product Lines/Outboard Motors/Products/DF200AP/2012/DF200AP.aspx
settled on 4 blade 15.25 x 22 props after poor results with 3 blade 16 x 20. They slippped when goosing the throttle on takeoff and in current against standing waves.
4 blades feel good.
Loaded with 250 gals of gas and 150 pounds of...
