Q50 vs ??

Live in Philadelphia, have a 2017 q50 looking to upgrade to 2018 with less miles, around 50k for around $22,000 dollars. Got to thinking What other cars could make power as simple as ours? Buying used parts to go fbo and tune around 5-6k in total rough estimate on stock turbos of course. M340i is far too pricey they are around 30k any older bmw? Mustang? V8s? V6? I bought this q50 out right when I was younger after a very stock 328i This was my first “sports” car its all I know lol, any suggestions? I was looking into older gt 5.0 mustangs not sure on American NA shed some light what cars are in our price range and our power league? TIA