Flush fitment for CEs

I'm planning to finally change my AP2v2 wheels for a set of 17" CE28SLs. Currently the car is sitting on H&R lowering springs (I believe -25/-25mm or 1" F/R) with OE shocks. I like the way the car sits, and in the near future I'd like to upgrade to Öhlins DFVs keeping the slightly lowered height.

Car is being used on the street for somewhat spirited driving. I have stock tire setup: 215/45 front and 245/40 rear, Michelin PS5 all around. It would be nice if I could keep the staggered setup with these tires, as they are rather new.

Now the fun part: I'm trying to figure out how to get a little bit more "flush look" for the new wheels. I digged into a little bit of fender rolling which I'm not scared of if needed, however, pulling I want to avoid.

I've found these kind of 17" CEs in the EU market:

9.0J ET45 / 9.0J ET63 / 8.5J ET45 / 7.5J ET48

As I see I have no other option for the front but the 7.5J ET48 (assuming I keep the tires and stagger setup). To match the wider flush look at the front I figure I should go for the 8.5J ET45 at the back. What do you guys think?

I calculated with the latter two, rear and front respectively and came to the result that front would poke out 13mm more, and rear 20mm more compared to stock. So please correct me if I'm wrong, but probably rolling front and rear as well (also tab relocation).

This is my very first aftermarket wheel project and don't want to mess it up.