They do seem to be a good choice at around this money

We found that one on AT, but it did take a few weeks and a couple of visits to some rubbish ones. This was the third car we went to see/test drive.
Hardly anything in terms of power/performance, the 1.4 is marginally more powerful and uses a drop more fuel.
However the 1.4 is more common since it was in the Mk6s from the beginning of production, whereas the 1.25 was added a couple of years into production.
Edit: Have a read through my original thread, lots of very helpful advice from forum members:
http://forums.overclockers.co.uk/showthread.php?t=18400223