I am planning to get shot of my UFO's so

Looking for options

I have URS6 calipers and RS4 (2000) type calipers. Both of which use the same mounting holes. (URS6 struts)

Would i be better upgrading the pads and discs on the S6 setup or fitting the RS4 calipers and doing the same with them Upgrading the pads and discs.

The URS4 will be around 450bhp. I hope!

I have also looked at the Porsche setup.

The car will be for road,track and 1/4 miles.

Thanks in advance