Andrew,
First off… IMO, dual shocks would be major overkill. --- With so little sprung/un-sprung weight, you simply don’t need that much damping… a single shock with the right valving should be way more than adequate.
Right now I still have the stock shocks on the VX - but I’ve been running Rancho 9000s on the Rodeo for years. --- Their adjustability is what made me choose them in the first place – and I’ve been very pleased with them.
Since the VX shares the same dash configuration with my 1997 Rodeo, here’s a thought…

If you can get it to work properly (without leaking air *), the In-Cab Controller is a nice upgrade. 
* The secret is to use Synthetic Bearing Grease on the O-rings inside of the adjuster chambers, instead of the manufacturer-recommended White Lithium variety. --- The heavier grease makes a much tighter seal… Just be sure not to use too much.
At some point I’ll almost certainly install a set of Rancho 9000Xs and an In-Cab Controller on the VX. --- It’ll be nice to have the same ability to smooth-out the ride quality on rough city streets, highway trips, etc. - and then dial-it-up to ‘bone-jarring’ whenever I like (simply by pushing that red button from the comfort of the driver’s seat) for spirited driving on curvy mountain roads, off-roading, etc.
Take my word for it - you don’t have to dial Ranchos all of the way up to the #9 setting to get a firm ride… they start getting mighty-darn stiff at about 4 or 5. --- If I had to guess, I’d say that somewhere between the #6 and #7 setting is about equal to the stiffness/firmness of the stock VX shocks. --- Driving around in my Rodeo with the Ranchos set at #9 almost feels like I’m running sold steel bars for dampers (they would undoubtedly feel even more harsh on a VX).
HTH!
"This trail is so bumpy, it's knocking my bra straps off!" - Miss Kathy