have been very happy with our 1997, 1999, 2002, 2005, and 2008 F150 Supercab 4x4 with 6.5' beds.
all have been equipped with the factory towing package.
have towed a 1976 31' Sovereign
, a 1981 31' Excella II, and a 2002 25' Safari Six Sleeper, using a Tekonsha P3 brake controller that currently sits on top of the dashboard in the factory tray that's there. I drilled a 1" hole in the tray and snaked the connector cable down to the trailer harness connector. the rubber mat in the tray will cover the hole.
am currently equipped with the 5.8L V-8, automatic, electric 4wd, 18" whls & tires, etc. I always order my Fords from the factory, so that we get what we want, and don't have to pay for options that we don't want or need. it usually takes ~4 weeks to take delivery, and I believe that it's the least expensive way to buy or lease a new vehicle.... we usually pay something very close to "paper cost" before including whatever current local / regional / national promotional offers apply.
reliability has been good.
suffice it to say, we expect to order a 2011 or 2012 replacement in about a year.
some will prefer the Crew Cab over the Super Cab, but we use the cargo space of the smaller back seat and the larger bed, while keeping the overall size "parkable" here in the 'burbs.