We have nearly the same boat and pull it with a 2008 Chevy Tahoe 4X4. Even the steepest and wettest ramps are easily handled with 4WD. Do yourself a favor with your next tow vehicle, get the 4X4 option for a boat as large as ours. We're also in the market for a new truck (to replace my work car). It will be one of the two: 2010 F150 4X4 or a 2010 Dodge 1500 4X4. Best of luck!
Don't forget about the importance of gear ratios and limited slip/diff lock differentials. They play a large role in getting your boat out of the water too.
_________________
2008 H220 Frenzy - 5.7L VP SX Drive
2013 Tahoe LTZ Tow Vehicle (admiral's ride)
2011 Ford F150 XLT Ecoboost Tow Vehicle