Not much to look out for on them, it's just what you'll need to possibly expect when it comes to repairs. I've got a guide that I post on FocusSTOC...
It's best to join up for £10 a year and you'll get a wealth of information!
EDIT:
A few things to get you started:
22-25MPG average
30+ achievable on a long run (I did a 360 mile round trip to Liverpool and back to Newcastle and got 35MPG)
Tyres are £100 a corner for midrange, up to around £125-£130 for premium
Common Faults:
Alternator - £200-£250
Oil Filter Diaphragm - £150-200 (Cheapest is currently £146)
Slipping Clutch (Occurs normally only after remapping) - £750-£850
Undertray being obliterated - £53.23
Modding:
Remaps: Stage 1: 250-270bhp (Can be done on a completely stock car)
Remaps: Stage 2+ Completely depends on the tuner. Collins Stage 2 for example requires full mods but is 320bhp, while Bluefin can be put on a stock car but will only run around 270bhp.
Intercoolers: £260-£500
Exhausts: £600-£1,000
Induction Kits: £250-£400
Eibach Springs: £200 fitted (Most say this is a necessity)
Thanks for the info mate.
How much do you need to spend to get a good spec / condition ST-2?