I had a couple of questions for all you tire experts out there.

I would like your opinion on if I should go with this wheel in a 19 with 9.5 in the back and 8.5 in the front.

or

20 inch with 8.5 all the way around.

Also what size tire would look good with either of these?

What tires?

20" that is 8.5 wide.....you wont be able to put very wide tires on.

I think 18" or 19" tires are plenty big enough. I would go with an 18x9.5 wheel...or 19x9.5.

But definitly not less than a 9" wide rim.

Ditto!

Agreed, 8.5 isn't very wide, but as long as you keep 35 series tires or above and lower the car, I like the look of the 20s (doesn't make the car look as huge as it is). Those look pretty nice as well, but they also look very heavy.

Big, heavy wheels with little sidewall will definitely have an impact on the ride and performance of the vehicle (and not a good one). Just be prepared.