I recently bought a 2008 UrbanRunner with the same 18x7.5" wheels as the Limited. I want to keep those wheels and will not be adding a lift.
I have ordered wheel spacers - 1.25" front, 1.5" rear.
I do not offroad. Most of my driving is on dry road, with some rain, snow, and ice in Denver and the surrounding mountains.

The vehicle came with 265/60R18 tires, and I would like to get something just a bit bigger. This is just for looks, I am not planning to go offroad.

Should I go with a 275/60R18 or a 265/65R18?

Am I correct that the 275/60 will be a bit taller and wider (maybe an inch each way?) while the 265/65 will be an ~1 inch taller but the same width?
Is one or the other more likely to rub in the front tire, given that I have wheel spacers?
Is the 265/65 going to look oddly tall and skinny?
Will every tire in those two sizes fit my stock wheel, or do I need to check that before buying?

Thanks for all responses and opinions!