In need of some educated help and opinions on proper tire size. Normally I could do this myself but Im making a few changes this season and want to get it right the first try. Figured I seek some advice.

Variables:
949 Racing 15x9 6UL +12 (will be using my current 17 & 19 mm spacers or other spaces to get it all proper)
Carbon Miata Fender Flares

So looks like tires options are:

a) 205/50 - Looks like the Falken Azenis or Maxxis Victra would be the choice here. I run 205/50s on my 15x8 right now, not sure if that size be good for the 9" wide wheel

b) 225/45 - Probably would go with Hankook Ventus RS4 in this size.

c) 245/40 - seems like these are for a 10" wide wheel but Havent completely ruled those out.

So in MazdaRoadster opinions, what tire sizes do you all recommend for a 15x9 with low to negative offset wheels and fender flares?

What do you all think would perform the best? What size do you all think would look the best (fill the fenders nicely)?

Performance wise, car will be driven during summer months during nice weather and the occasional autocross.

thanks!

Paul B