I am looking for advice on lifting/leveling my '03 F350 SD Crew 4x4 (SRW short bed) and what are the largest tires w/ E load rating I can stuff under the truck to retain it's on road tow/hauling capability and increase it's off road performance.  I have the 6.0L PowerStroke diesel and run stock 3.73 gears pushed by the 5-speed auto tranny.  It's my daily driver work truck and I often max out the trucks payload and towing capacity therefore, I must have tires rated at E Load range or better.  I drive it off road occasionally (not nearly enough) in mud, sand, deep ruts, and loose rock/gravel, and in winter on snowy roads & fields.  Needless to say the stock LT265/75R16E Pirelli Scorpions don't do all that I want or need.  What is the best and minimum lift or leveling I would need to run 315s to 33s?  Who makes the best leveling or lift kit for my truck to keep it handling as close to stock as possible?  Who makes a good 16" A/T or M/T with an E load rating?  I have run BFG AT KOs on past trucks and loved them but, they don;t seem to have the load rating and I don't want any of my money going to the French (Michelin).  I want to level the stance of the truck and get bigger, more aggressive tires to handle the various terrain I drive (often with a 10,000#+ trailer in tow). Oh yeah - cost is a major factor, too.

Any help would be greatly appreciated.