We have a Twingo, its very well padded and very comfy and our daughter seems happy in it sowe are really happy with that. They were quite expensive but they came down to 149 a few months ago.
Smyths are very helpful – they will show you how to fit the car seat in the shop and their prices are great. we got our 4 year old a princess car seat in there for 49 euro and it was 99 euro for the exact same one in Tesco!!
Mothercare will actually fit the seat for you – they have a fitting station in their Drogheda store and they have good deals on sale in there, check out the Cosatto range, very good.
HTH