If you are going Zetec, check the chassis very carefully. The exhaust is routed through a hole cut in the chassis rail and they have been known to crack in the area of this hole.
If you can run to it, a post 2012 4/4 with the Sigma engine and an MX5 gearbox is a delight - and can be chipped. Depending on budget, a Ford engined +4 from post 2005 would be good too - around the 150bhp mark.
