for now i'm just looking for something larger than 340mm "full front kit" for less than 2600 (ECS/Turner price) which was the cheapest i have found. not interested in chinese parts...
------- edit -----
i just found these d2 which are apparently popular out here in japan and recommended by a bmw friend out this way. found a shop in WY selling for cheaper than the d2 site themselves:
https://www.tpsgaragestore.com/d2-ra...-series-13-up/ 1676$ + shipping for full front kit seems to be the best i can find at the moment; 356mm rotor, 8pot caliper and street pads...?