if you want to build a reliable everyday car why would you use unreliable old fashioned RST management, either use quality aftermarket management to go turbo or if you want a reliable everyday car would 135bhp mondeo 2.0 silvertop do the trick?
or what about the 150bhp duratec from a fiesta st / mondeo mk3?

the T5 is the obvious box choice if you want rwd in a saph