This is the wheel that I was looking at. The problem lies here, I want to upgrade to a 19". But the most logical would be going with a 9.5" width (thinnest in that option) and offset of +30 (highest in that option). According to my calculations, this wheel would stick out .8" all around. I want the flush look, but this may stick out too far am I correct on that?

If the 19" wheel doesn't work out well, I will be going with the 18x8.5 (same as stock) but with the highest offset of +45. I calculate that to stick out by about .2" which I think would make it sit flush.

Any wheel gurus know if the 19" option would stick out way too much to be even close to feasible?

Actually, I did find 19x9.5 et40, which would push the wheel out by .4". So my choices run as of now -
19x9.5 et40 pushing out the wheel by 0.4"
18x9.5 et45 pushing out the wheel by 0.2"

Which would sit more flush with the fenders?