Invidia, HKS, Nismo, Stillen, are the main ones that people run. I do not know of anyone running a Borla exhaust. No reason not too if you like it, but no one here is running that set-up.
Invidia, Stillen, and Nismo are the main exhausts for either a 35/45. Stillen and Invidia being true dual exhaust lending for future modifications for performance on the engine. Stillen has been known to show surface rust back east. I have Stillen on my 35, HumbertoCali has one on his 45, and we show no surface rust issues here in Cali. TurboCad6 is in NY, and his Stillen exhaust looks horrible with all the surface rust.