For starters, you SHOULD be able to drop the front by cranking the torsion bar. This will make for a MUCH bouncier and stiffer ride (I know, cause I tried it already). As for the rear, of course, springs will need to be worked with. I dont recommend cutting them, but maybe having some springs measured and clamped, or if a manufacturer offers a shorter spring. This, however, has some side effects. You most likely will have to trim down the suspension buttress within the rear spring shaft. I have not dealt with the rear yet due to horrible weather here lately, but I am planning on checking it out.
Also, note how low you want to go, because the tranfer case will not allow you to go too low. The VX simply isnt designed to be slammed. My plan was to drop about 2". That seems safe by my measurements.
If you happen to find out any news on manufacturers or products to use, do list them here. I know a few others are also interested in getting a tad closer to the tarmac.
Gary Noonan
'01 S/C VX / '18 Forester XT