Depends on your budjet and what you want from the car.
Ive only had the ERST, but my mate had the FRST.
Id say either a S1 or Fiesta. ONly an S2 if your real desperate
Over all if your undecided, if you can find a good one get a fiesta.
They are rare and its always nice to see a good one.
Warning tho i remember a mate getting an insurance quote and the Frs was more expensice then insuring a saff cos!!

Was some years back tho!