Laptop with mobile broadband

Hi there - My dad is looking to buy a laptop with mobile internet package.

He'll be using it for mainly surfing, emails etc, nothing too processor, memory or graphics hungry.

Largish screen is important though, so a netbook is really out of the question.

There are various offers around for a 'free' laptop if you sign up for mobile broadband (typically around £35 / month or so).

Can anyone point me in the direction of a decent deal, or is he better off buying a laptop and subscribing to mobile broadband separately.

Help, as always really appreciated.

Paul