I suppose it depends on what you want...
As far as I've read, the facelift is quite a big one under the covers. There are slight changes to the exterior and the interior styling, but most of the changes are to do with the suspension etc.
I don't think there's so much of a difference to the dynamics that you'd actively notice it in every day driving though, and you'd probably need to be really good to notice the differences when on the edge too.
I suppose at the end of the day it depends on what you want to do with your money. If you can take advantage of the special and get a higher spec model pre-facelift than you'd get on a facelift model, I'd probably go that route. At the end of the day it should come down to what you can get out of the car - and if you can get more for the price, I'd go with the pre-facelift.
If you want the new model though and take into account that a facelift model is going to resell for more and that's more important to you - then go for the facelift...
Just my thoughts..