I play about 8 tables max on laptop, with slight overlap.
Looking for something that can handle up to 10 tables with no overlap.
I don't use a hud, and most volume is on sites where Huds are not allowed.
You really don't need high specification then. I haven't looked for a while but I can't imagine you would need to spend more than about £400. Take the extra and invest in a big monitor!
dell.co.uk might be worth a look. Also ebuyer.com