Since your country is so restrictive on modifications AND you also are interested in driving something unique (and potentially turbocharged), I guess you are left looking for vehicles that are interesting from the OEM.
Q: With an oddball car, do you plan to do any repair work yourself or do you plan on hiring a mechanic for most jobs?
This might restrict the age and/or complexity of the car you want to look at finding.
Some cars that we can't get in the US that I find interesting. We can't get them in the US until they are >25 yrs old BUT even then emissions restrictions in CA prevent me from importing them (also garage space):
Renault Alpine GTA/A610 - turbo V6
2000-2002 Audi S4
2000-2001 Audi RS4 (not avail in US) but adds practicality b/c it's a wagon, too.
I own one. Not the most easily serviced cars (and lots of little bits fail over time) but a) they are cheap now, b) common enough that parts/expertise sourcing shouldn't be an issue), and c) pretty fun to drive because of the Biturbo V6 + AWD.
Clio V6 Renault Sport
Mid engine RWD hatch w/ a V6 (no turbo though)
Or maybe one of these Japanese turbo 4s
Mitsubishi Lancer Evo 4/5/6/7
2nd gen MR2 Turbo
Nissan Silvia S13/S14
- Good luck finding any of these that are still in stock form