If you want a german sports car you have a few options, you can visit an Audi showroom or their site to see what they are offering and their capability for maintenance as well, rs6 and rs7 are feasible. You can get a bmw M series car, there are a few in Pakistan, I just saw an M2 in Isb and it was an actual M series car, There are a few AMG cars as well and their maintenance is done by Shahnawaz. Porsche also has a dealership in Lahore I think and they are maintained there.
I would recommend a Japanese sports car, they retain their value more than others and are more reliable as well while requiring less for maintenance