The optional extras on my car cost over £7k. Personally, I really do not need Art Velour seats, keyless, dynaudio, lane assist, dynamic light assist and a reversing camera. Even the performance pack is not a necessary option for me.
For just £450 (PS4) to £650 (PS4S) I get a quieter, more comfortable car, with improved acceleration, cornering and braking. Personally, I think that is money very well spent!
It would probably take me 3 years until the Bridgestone tyres need replacing. I really don't think I could stand them for that long. 3 months maybe.

I have always planned on replacing the tyres for something better, sooner rather than later.