Are Curry's offering interest free payments over the 48 months?
If so that's ok, once you get them to accept the credit agreement.
If not I'd be tempted to save up for a bit, and go into a shop selling the laptop you want, waving the cash.
There are deals to be had for cash. I recently got a great deal in Comet by paying with cash and having a good old haggle.
Good luck.
