After 3 sets of spacers and several months gone by my wheel fitment has sorted itself out:

FRONT-

TSW Nurburgring 19x9.5 ET41
8mm Eibach spacers (effective ET33)
275/35 B-stone S-04's
Screws removed front front fender lip (one screw per side)
26" front ride height (ground to fender lip), raised 1/4" via KW3's.
Max OE spec Negative Camber
"De Nubbed" front uprights (leaving a slight mound)
Inner tire to upright clearance: appx 3mm (30 series tire would appreciably increase this)
No fender lip rubbing (have not pushed the car very hard in corners, but still fairly quick at times)
Slight tire to wheel well rubbing at full lock (due to larger diameter tire with 35 aspect ratio; plastic liner tends to warp, if fully flattened may not rub at all)

REAR-
No spacer, plenty of clearance (10-11" wheel with 295+ tire, perhaps??)

We test fit other tire sizes (265/35, 275/30, also B-stone S04's) but wanted to protect the wheel a bit more with the 275 width (and didn't care for the look of 30 series tire and reduced gearing effect).

This thread has been very helpful, so here's to putting in my 3 cents worth to hopefully add a little more momentum on the wheel fitment quest.