Netgear or Linksys are both good reputable brands. A router should always be hardware independant as it is protocol driven, TCP/IP which is used on all modern harware.
I would probably spend the extra and get a wireless one, that will still have 4 wired ports, this will give you flexibility in the future. As a Mac and probably iTunes user, you could then add an AirPort Express in a month or so and connect your stereo to iTunes wirelessly for example.
http://www.apple.com/airportexpress/
(which also sorts your networking and printing needs - see below - just not availible for another few weeks. Could look at the airport extreme)
http://www.apple.com/airportextreme/
Wired Linksys BEFSX41-UK £42
Wireless and Wired WRT54G-UK £53 so £11 for the future flexibility.
(what I have)
Also think about one with a USB printserver built in. I imagine you have a printer at home, it will need to be attached and shared from one of the PCs which will need to be on for the other to use it. If you get a router with a print server included that problem goes away.
Netgear Firewall Router With Built In Parallel Print Server And 4 Port 10/100mbps Switch £69.44 inc VAT (not wireless)
http://www.ebuyer.com/customer/produ...duct_uid=47104