Thank you all for your gracious and very much appreciated comments.
It's nerve racking to expose ones' pride and joy to its first public scrutiny and appraisal on the renowned Z4 forum.
For those of you loving the alloys from the receipts I have from the previous owner they are the 3SDM brand 9.5x19 ET 33 Rear; and 8.5x19 ET38 Front. They came from Rtec Auto design.
Even with the lowered Eiback pro springs with non run flats they provide both a great ride and traction.
Looks like my ultimate dream - grey, red seats, wonderful cross-spoke wheels! I still remember when I picked my Zed - an unforgettable moment that no other car had matched before... and will in the future.