2003 Ford Super Duty F-350 SRW XLT Package (7.3 Power Stroke Diesel) $18,990

Commercial use is one of the fastest-growing segments in the expanding truck market. With its F-Series Super Duty trucks, Ford is aiming squarely at fulfilling this segment's demand. The Super Duty trucks, introduced in 1999, are built on a separate platform from the smaller F-150. Bigger, stronger and more robust, they are meant to perform feats of which the F-150 isn't capable. The maximum GVWR for the F-150 is 7,700 pounds, the F-250 Super Duty can handle 8,800 pounds, whereas the F-350 Super Duty starts at 9,900 pounds and ranges up to 11,500 pounds. The Super Duty isn't for everyone; depending on model, the turning circle can top 58 feet. That's not much fun in city traffic. Pricing on a diesel-equipped Crew Cab can approach $40,000. However, if you need more truck than the regular F-150 can provide, Ford has quite an impressive lineup of heavy-duty trucks to peruse.