Macbook Uni or Macbook Pro

Hi there,

I have the opportunity to buy one of two macbooks and I would like to know what people think-

Option a)
Macbook Pro 13.3", 2 Ghz, 2Gb, 160 HDD - 2009 model still covered by AppleCare till Sept. £720

Option b)
Macbook unibody, 2.4 Ghz, 2Gb, 250 HDD - 2008 model, out of warranty. £700

I'm not sure whether it would be better to get a newer, lower spec macbook pro or a better spec older model.

Advise please

Cheers
Jake