new tires

So I've hit a little bit of a snag. I need new tires to be able to get my bike inspected (which I currently have the ones I ordered in), but every shop I call seems to be weeks behind schedule on their work. Now this wouldn't be an issue if I had stands and could just bring the tires to them...

Also, do you guys/girls prefer a 180 or 190 rear tire (why)? Im a pretty new rider and this is my first time buying Tires. :O