I have a 2016 535i M-sport and I'm looking into getting some new wheels. With 245/45 19x8.5 ET33 in the front and 275/35 19x9 ET44 in the rear, I want to keep it staggered but go a little wider.

The wheels I'm considering come in 19X9 ET28 for the front and for the rear there are two options: 19X9.5 ET22 or 19X9.5 ET33.

Which option would be the better offset for the rear? Any other thoughts/concerns/experience with this setup? Spacers? Suspension is currently stock but I will also be installing coilovers. TIA