Lowering springs which make ???

Hi I bought a set of lowering springs for my sr was told they were 40mm but it seems to have gone even higher than standard .. ??
So I'm going to buy a new set of 60mm , I'm running speedlines with low pro tyres etc so hopefully get away with 60mm.
A quick browse on eBay brings up so many makes now . When I was younger it was spax. Gmax etc now there is
pro sport at the cheapest
Spax at most
Apex in middle
Pi same
V max.

Can't find any G max . What make do you guys have or recommend thanks sam