Lap/tabletop. Pikey palace for downloaded dvd's and music. Spreadsheets and word as well as specific software for various pastimes. Looking tomget a modicum of future proofing, as well as I'm able.
Not convinced you'll see the benefit of i7 over i5, given your usage. 6G RAM is probably excessive, but memory is cheap

. Ensure the processor is a 'Sandy Bridge' version of i5/i7. Discrete graphics can reduce reliability, and kill battery life, unless you really need it, I'd probably stick to HD2000 graphics (built into Sandy Bridge CPUs.
Given the potential reliability of laptops, which can get knocked etc, dont rule out extended warranties, as much as that might pain your Scottish Wallet

Those 'widescreen' ones, often having a keyboard with a numeric pad on the right, can be a bit bulky for lap use - personally I can't get on with them.
Brands I tend to like are HP (though who knows how long they will be making PCs for!), Dell and Toshiba. I am currently on an HP Compaq 6720s - old, but suits my needs.
If its just surfing/email, given your Pikey tendencies, tablets? I'm kind of hooked on my tablet, which has surprised me, as they are a bit, errr, gay. My HP tablet crashes when I try to ban users on OOF though
