Jamie, as you will now know I went for the 17" ones as they looked better and also filled the arches much better than the 16" ones. The 17s with Toyos cost me £775, which was what Halfords quoted me for 16" with cheapo tyres!
SKIDZ at Falkirk were going to charge me £600 for the 16s, as several friends, family and I have bought wheels, alarms and stereo equipt. from them so we get a good discount. If anyone from here mentions Cliosport to them, especially Craig Scott, you will also get a discount for wheels etc.
They will also let you try different wheels on your car if you arent sure what you want. Helpful friendly lads.