Need some advice.

As title says im in a financal position to buy and insure a S2 rs turbo and a sierra saphire cosworth to be honest im torn between the them

Erst: planning to buy modified 160+bhp
cossie: planning to buy as near as standard power as possible(as it would be my first RWD car)

only thing that worries me at the moment is that i live in london and i dont have a garage or a driveway so the car would be parked on street all the time i work just round the corner so i would leave the car at home during the day, i only use the car at weekends but a daily driver if needed, whatever car i buy will be fitted with decent thatcham alarm/immobiliser, full cover steering lock and a tracking device (the type that would contact me if the car get nicked).

what im asking is if there are rst or cossie owners out there that has there car parked on the street? and if they have any problem with not having a garage or driveway to park them?