Oooohhh... Pentium D... Seriously, if you can afford it stretch for a model with a C2D. Pentiums are olde technology these days. You'll see a benefit in performance, battery life and heat generation. Other than that though it doesn't look too shabby.

Where do you plan to buy from? The Acer website or a local retailer?

Would you consider a different brand completely? My experience with Acer hasn;t been the best (repairing friends' laptops. There are some major build quality issues in some models such as hard drives being held in with chunks of rubber and glue without actually being attached to the chassis in any way.)

You mentioned in your first post about limited availability in the UK. Does that mean you were planning on buying from the UK? If you are there doesn't seem to be much of a shortage of choice. If you can, take a look at the PC World website. There are some pretty good deals on factory refurbs there...