IDEAS?I've been looking at applying a wireless soution to my cabled hell.

I regularly use 2 PC's in my home the laptop and Desktop both opposite sides of the house the network cable is annoying! but hidden. USB2 on laptop 1.1 on desktop. I don' t want to leave the PC on all the time but want access to the net without the pc on upstairs.I have a 2mb ADSL connection used for online games and ft.
What do you think about the items below?
Are there any packages that are cheaper?
Is there a noticable difference in speed?
1. BELKIN F5D7632UK4 54MBPS ADSL MODEM WITH BUILT-IN 11g WIRELESS ROUTER
£58.99
2. BELKIN F5D7050UK 54MBPS WIRELESS G USB NETWORKING ADAPTER
£14.99
3. BELKIN F5D7001UK HIGH-SPEED MODE WIRELESS G DESKTOP PCI NETWORK CARD
£19.49
PC world online + pickup price