For VE V6 owners contemplating this, I've done it. It cost about 10,000 for the kit, and a bit extra on top for the labour. Was out of action for under a week while it got fitted and tested, but that's it. I've got it running at 5psi, and seriously, I'm happy with that. It gives me more than enough punch to zip ahead of the pack comfortably, and you gotta love the whine of the supercharger in action. I thought it was going to be a pig on the fuel, but I've noticed no difference.
As for why I bothered to do it? Why the hell not? I was curious just how far I can tweak a V6 from being the poor cousin to a V8, to a "phwoar" machine.
Engine reliability hasn't been an issue at all, although I do run it on nothing but BP Ultimate and it is regularly serviced. The supercharger had one issue with the pully making a freaking squeaky squeaky noise (lol) but that was easily taken care of (properly). Insurance is through Shannons, but I do have the advantage of age and spotless record.
Regrets with getting it done? None, bloody great modification to the machine which is so enjoyable to drive.
*Edit* Almost forgot, if you're married, tell the missus it cost about half