E36 coupe rim/tire setup without mods.

[E36coupe25i]

Hey guys. I just bought a mint condition e36 325i coupe from 1992.
It came with 19's and i took them off right away, now it has 15's (temporary)

My question is im looking to buy either bbs reps lemans or bbs Rs, i dont want to spend $5000+, but im confused in rim/tire setup without modifications like rolling fenders,

What i have been looking for.

Front : 8.5x17 ET 30
Rear : 8.5x17 ET 15

Tires i dont know but how would this look like?

Cuz the 19's i took off were FRONT 8.5x19 ET 40 and REAR 8.5x19 ET 40 but they still had alot of room to the fenders.

I want it to look good but also no modifications.

Hope you can help.

Greetings from Denmark