I know it's been covered in older posts, but I thought I'd raise the question again and get some current advice.
I have an 05 R53 that I intend to autocross, but it's also my DD. I'm installing Cross Coilovers with camber plates and will probably lower 1.5 inches or so. I have a 22 mm RSB set to stiff and am running 205/50 BFG's on stock 16" rims. I'll also be installing H-Sport adjustable rear camber links. I'll have an alignment next week and considering these settings for combined street and autox:

Front:
- 2.5 camber
0 toe
As much caster as possible

Rear:
- 1.5 camber
1/8 toe in

I'm a complete nube when it comes to alignment and the specs above are my distillation of many other post in the past.
Looking for advice from you much more experienced guys!

 

personally would shoot for 0 toe all around and maybe -1.0 camber in the rear.