1Pirate:
Sounds like a sensible susp setup
I don't know about the E8x but most guys set the rear Koni's too stiff on the E90's, especially w/o M3 subframe bushings. 2/3 from soft sounds good (I set the rears at 3/4 from soft). May want to turn up the front struts tho..
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2007 E90 335i, TiAg, 6AT, ZPP, ZSP, ZCW, 6FL, HD
Quaife lsd, ETS fmic, GIAC s/w, Dinan intake/exhaust/oc, Koni/M3 susp, Apex Arc 8, Mich PSS