Re: What looks good on an XA-XC?
First of all Jack, are you sure your 12 slotters are not 14"? 15" Globe Bathursts are a good option, or for 16" wheels (225/50/16 tyres) I think an XC would look good on the EF/L XR 16-inchers, but most "normal" looking 5-spoke rims wouldn't be too bad.
As for tyre roll, the taller the side wall the more tread-to-wheel movement you will get, but with a more comfortable ride. And vice versa. I’d agree with 50-series being a good compromise, also from a looks point of view I think older cars look better with a bit of rubber on them rather than licorice-strap tyres.
225/50/16 tyres on a 16x7 wheel is the standard 16” size on a Falcon which means the wheels and tyres are easily available and wide range of choice (I’ve got 245/50/16 on my ute as it needs taller tyres, and I can tell you they are a lot harder to get).