We traded in our '09 F150 for a 2011 F250 Lariat FX4 about a month ago. Got the diesel 6.7 with the nav package, tow package, heated and cooled seats, all for $300 over dealer invoice. Truck is not even broke in yet and I'm seeing about 5 mpg's better while towing, not to mention that the over all "tow experience" is significantly better. Well worth the extra $$$ IMHO.
2012 Ford F250 Lariat FX4
2012 LaCrosse 318BHS w/4 Point Equal-i-zer Hitch
2 Wilderness Systems Kayaks
Nights Spent Camping in 2011 (19), 2012 (16)