Hi Stev,
I owned a 172 CUP for 2 and a half years, have driven in a 172 numerous times and driven a 182 with cup packs as well so have a small bit of experience.
Personally - go and test drive them all. I found the CUP was superb and exactly what I wanted but after about a year, I longed for air con... i went and drove a 182 not long after and didn't really use it - go figure. lol.
I wanted out and out bargain hot hatch when I got my Cup and Price per
its a winner but with prices now being around the same as a 172 with half leather and air con and ABS, I was left wondering if it was the right choice.
On the road theres jack all in it between all of the 2.0 liter 16v Clio's. Find a nice tasty, well looked after and un-touched example for good money - and you're laughing.
Remember - ask for as much advice as you want on here especially as to what to look for, what to pay, what trim level and spec it should be etc and then remember to join up once you've got your new baby.
Oh and the final thing - enjoy it. They are all an absolute scream to drive.