Hi tynesider, "old" model is the wrong description. Pre "facelift" is better. There is hardly any difference between the two, the main thing in my opinion is the new 1.3 engine, and you have it.
You are bang on there, not enough to worry about getting an older one provided discounts were made. Realise the OP has the facelift car so just applies to anyone who bought at the time without realising a revamp was just around the corner.
This is one of the major benefits of forums like ours, to make prospective buyers aware that halding of for a few weeks for a new edition car is worthwhile or even if the dealer has informed them of this. I know many dealers don't as they want to shift old group stock first.