I run a TW chip in my '96 F-350 'toy', and a DP-Tuner chip in my '97 daily driver, and I love them both, you can't go wrong with with either one.
You have options, call and talk to both of them and buy from who you're most comfortable with.

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Black, '96, F-350, 4x4, Day Cab.
Black/Silver, '97, F-250, 4x4, CC SB
DzlJim.com for some redneck engineered projects.
RacerXautomotive.com for your upgraded E4OD/4R100 needs.