Webuser Forums: Best Wi-fi set up?

Hello everyone, really hope you can help.

We currently pay for our phoneline/cable/internet all from different providers and would like to get faster broadband and a better/cheaper service.

We would also like to upgrade our router (for faster, more reliable internet) and to start using VoIP.

Ok, so a rundown on our set-up at the moment.

- Internet Service Provider = Zen (£25 per month)
- Zen ADSL through our phone line provided by BT (£11 per month)
- Virgin TV (Cable) (L package, £11 per month)
- Seperate office phone line (Virgin, £11 per month)
- Netgear, Wireless ADSL modem gateway DG824M
- We are running 4 laptops, an internet radio (Roberts WM-201) and a wireless printer off this.
- We live in a tall house and our road has cable.

Basically the internet is constantly going down and the radio is constantly buffering. We were thinking if we had a decent broadband connection and faster speeds we could switch to VoIP because it would be a lot cheaper? The laptops are often in use at the same time, and a lot of downloading streaming etc goes on.

We need a set-up that can cope! What do you guys (and girls!) recommend?

Other questions:

Is there a good package where we can just use one provider (ie. save in cost)?
An ISP that provides fast, unlimited downloads?
A router that is fast, secure, up to date, can use VoIP?
Recommended VoIP phones? Expensive?
Could we use our old router as a booster?

Sorry this post is a bit of an essay, it's all a bit of a minefield. Really hope you can help.

Rob.