Staggered Offset Help

[MRobi]

Looking to put a staggered setup on my 2011 x5.

I know the factory sizing/offset is:
20x10 ET40 Front
20x11 ET37 Rear

Selection with those specs seems very limited (Maybe it's a Canada thing).

I'm looking between 2 almost identical styles of rims.

Braelin BR10
20x9 - ET25 and ET 38
20x10.5 - ET20, ET30 and ET40

Niche Gamma M224
20x9 ET35
20x10.5 ET35

My instinct is telling me to go with:
20x9 ET25
20x10.5 ET30

This will give more inner clearance and extend both front and back by an extra 2mm. Not having a staggered setup right now, I'm not sure if that extra 2mm is going to cause any clearance issues.

Looking for advice from people with experience.