The SC will outperform the turbo install on several fronts. As mentioned earlier, intercooling isn't so much as an issue because the SC doesn't transfer heat thermally nor bake the engine bay like a turbo will. The plumbing required for a turbo radiates A LOT of heat! Look under the hood of any well-engineered turbo vehicle and note all the heat shielding and seperation of intake and exhaust components. The SC just doesn't have this problem as it is engine driven with no concern for exhaust gases. You can insulate and provide cooler air intake with little problem or modifications. You can intercool before the SC but the gains will be minimal as you're not fighting the heat normally generated by a turbo install.

Now let's talk boost. The SC install is a relatively low boost design. While I'm sure you can up the boost, you're just looking to kill the VX's engine. You see, it wasn't designed to accomodate an increased intake charge. While the 4 - 8 psi the SC produces (corrections please) falls within design limits of the engine, the 14 - 28 psi a turbo can generate does not. On my Merkur I push up to 25 psi, but the engine is DESIGNED to handle this!

So why go turbo when the SC is a simpler, more efficient solution with more potential power output? Plus, the power is available when you turn the key.