Advice on tyre size for new wheels!

Hello everyone, I have just bought some Ultralite F1.2s at 15x7.5 with an et30 offset. I am now seeking some advice on which size tyres to go for? I will be installing Meisterr coilovers too so want it fairly low but want to avoid arch rolling.

Thoughts?

195 50. You will struggle to find 205 any more.