Best Brake caliper for Audi A4

I have a set installed on my B6, powder coated Meteor Silver:

I've got an Audi A4 Quattro that I DD, Autocross and teach HPDE ( Track Days ). Originally I tried the TT carrier / A8 rotor (312mm ) upgrade. I later switched to Porsche Boxster calipers because I was getting pad taper on Track Days.

I've found a couple of kits from TRW and Autofren on Autodoc. I am not known with these brands so I thought that it'd be a good idea to ask here if anyone is known with these brands. And if it is safe to rebuild the calipers with this much diffrence, or If i should bite the bullet and get new calipers instead

I had the hp2 calipers on my A4 and hated them. The ATE calipers are much better and the pads are cheaper.