Well, get your PC sorted and take it from there. Don't bother with an all-in-one type graphics card, they're rubbish for serious video work! You're unlikely to get a 'proper' capture card with analogue connectivity in an off-the-peg PC, but it should at least have a firewire socket, in which case you can use an external analogue>digital converter (£150ish).
Alternatively, I think I might have a card that you could use - will need to look for recent drivers for it before I can be sure. Are your PMs on?
edit: apparently so...