I'm looking to get some tires and maybe spacers to give my car a wider sportier look on the wheels.

I've got the standard black rims with run flats on at the moment.

What are my options to put on the widest tires possible without rubbing or unbalancing the speedo?

Also, what spacers would you recommend to get the wheels out enough to not look like the car is going to tip over.

 

I would just upsize the tires by 1 as in if you have a 205 get a 215 for example. If you don't lower the car you will have plenty of room for a more aggressive fitment without rubbing. Also, check out the wheel fitment thread in the main f56 section for better ideas