We have the 343 in our 230 and run with an extra 1850 lbs of ballast in addition to the 1100 lbs or so stock ballast for wakeboarding on occasion. Load it up with way more than than for surfing regularly. Pulls for us just fine. Can't say I have ever wanted for more.
Note: Buxton Marine (regularly the number 1 dealer of Nautiques in the country) orders all of their 230s for stock with the 343.
Current Nautique: 2013 G23
Previous Nautiques: 2012 SANTE 230, 2011 SANTE 230, 2010 SANTE 210, 2006 SANTE 210