Not sure. You really need to be matching all three, and starting with the caliper makes for interesting re-engineering.

The Magna ones are very good (they need some machining), I use them as discussed in earlier posts, but they rely on using the large 180B axle/wheel hubs, and Commodore Calipers,
which are hard for our overseas fanatics to get. I've heard of other combinations, as used by Andrew Denniss, he uses hilux stuff (not sure of struts)
We should make up a matrix of brake upgrades, so others can do that same. Basically post:
Lower Arms
Strut
Disks
Hubs
Calipers
Modifications?

Cheers,
Chris