if you want your VX to have some 'serious offroad capabilities' you have 2 options-

1) save the money on all those parts, but the OME springs with a 1" spacer for the rear, crank the front...then lock both front and back axles...and add LOTS of underbody protection

2) SAS swap, lock, exo-skeleton, huge lift, keep going until you have a complete trail rig or are completely broke....

the VX is a GREAT offroad rig for a semi-stock vehicle...if you actually get out there and wheel the VX it will suprise the hell outta you, promise...

ask toddadams if you need a professional rock crawler to tell you about the capabilities of the VX... i believe he told me last year that his would keep up with anything with 33" tires or smaller....

thats pretty good for a vehicle that hasnt had rediculous amounts of money spent on it...