There is a lot to consider when thinking wheels and
lowering etc.
So wheel width will have an impact on what offset you can run with
lowering springs.
19x8.5 ET45 with 235/35 R19 Tyres is a safe bet for
lowering and what Revo and Racingline recommend for these cars.
OEM wheels are 19x8 ET50, so the 235/35 R19 tyres sit squarer relative to the wheel. So although a 10mm spacer may give the wheel a similar poke to the 19x8.5 ET45 wheel, the tyre is more likely to rub.
Your best bet is to aim for 19x8.5 ET45 or use that as a safe basis and compare using the link below with what you like, to see how much of a difference there is...
Wheel and tyre fitment calculator - it calculates inset, poke, speedo error, tyre stretch and loads more.
www.willtheyfit.com