supercharger's are the torque makers alot more than turbo's,
remember superchargers give near instantaneous boost whereis a turbo is powered by exhaust gas and therefore needs enough of it to make boost...
This is th reason why some people feel the need to do both so that they have boost off the line and still in the top end when most superchargers tend to stop making the power...
As far as the group buy goes, i really need to know numbers of people before i can work out how much i have to cut off the profit margin while still making it worth while... The fact that i have partnered with a local haltech supplier makes thigns slightly cheaper. Although at the same time there is actually not much profit selling the kit at current prices as it is as customs adds alot to it. If it was a group purchase all the items could be shipped at once making things alot cheaper though.
Well everyone knows how to reach me if they are still interested...
I have resently started a new parts business which will be stocking the kits making for quicker turn around. The site will launch within the month at
http://www.boostonline.com.au