New to me '09 Yaris

[MyBlueYar]

Hello all you Yaris faithful: I just picked up a great deal on an '09 Yaris 3 dr, and the one single knock on it was that it only came with snow tires. The original tires were worn quite thin. Pre-purchase inspection showed it was mechanically solid. 5 speed manual. I want to upgrade from the steelies to a different wheel.

In perusing the Official Yaris Wheel & Tire Guide, my eyes happened upon the optional tire sizes. Two sizes that did catch my attention were the 175/65-15 and the 195/50-16.

1. My bigger question is what size wheel will match the above tires. I noticed a few owners who posted pics of their setup, and I liked the 15 X 5.5 Mini Cooper wheels, along with the 15 X 6 Honda Civic Si ones.

2. I'm up here in Seattle and found a set of barely used tires for sale: they're an unconventional 185/55-15 for $160. So for those of you that have a better grasp than I do of these things, pray tell, what options do I have for wheels? My budget is $500 all in.