Thank you for the response, lots of interesting info in there.
It looks like from more reading and what you have said the PowerLite's will be perfect for my needs. The turbo engine will only be around 180hp, so within the limits of these. Also like you have said the massive lose in unsprung weight is a massive plus for me.
I have printed out the Flyin' Miata templates and the 10's and 11's are perfect with my Work Equips, I think I will go with the 10's as that is using stock 1.8 discs and easier to get hold of. I will just be using the 'fronts only' kit, so no messing with the handbrake for me