I plan on going with 18x9, 18x10.5
245/40/18
275/40/18

Or perhaps 275/45/18

Post the full specs of your setup for us? Look nice imho.

What offsets, +15?

18x9.5 +35 all the way around. 30mm spacer in the rear.
Tires are 255/45 and 275/40

245/40 is 4% smaller then OEM and 275/45 is 4% LARGER then OEM. Your ABS will go insane due to the front and rear tires rotating at a large difference of rotations per minute. If you want a 245/40 up front then run a 275/35 in the rear. If you want a 275/40 in the rear, run a 255/45 up front so atleast they match or atleast much closer to matching. You also have the option of 255/40 or 245/45 for the front with a 275/40 rear.

I know this is a little off topic but what's the widest tires I can go with on the base wheel ? The reason I ask is because I plan on installing H&R spacers 15 up front and 20 in the rear.

Stock widths are 225F and 245R. I wouldnt go more than 3 sizes bigger than the stock width. So maybe 255F and 275R. You can probably do more but its pushing it. I would be safe and to 245F and 265R.

Thanks mike I'm due for tires soon so was considering wider tires.

Question... I found a decent price on a square setup the only thing I'm worried about is the offset. The wheels are 18x9.5+35. I do have spacers but just don't if it will big enough to push em out.

I have the same offsets I ran a 30mm spacer in the back and nothing in the front. Looks pretty good to me

Cool if I do end up getting these. I got a 20mm spacer so I'll try that and see how I like it.

Well just checked them their varrestoen 18x9.5+22 all the way around with nitto tires. With that offset in the rear should I be ok with a 20mm spacer.

You would be similiar to my setup. The rear would be a +2 which should look nice, doit!

By any chance you got a pic of the setup?

Here's my contribution