HI there, I got the Buffalo G54 airstation with a wireless pcmia card for my laptop, works a treat and I found it a lot better than my old Netgear stuff, it comes quite cheap as a bundle, supports VPN, reprting, content filtering and if you have network printer is fab. It spoofs youir current mac address, so setting it up on broadband is pretty easy too.
I have a Netgear DG824M dsl wireless broadband modem/router, three PC's connected in a home network, one hardwired (beside router) and two wirelessly in different parts of the house. Also son's PS2 is connected. Wifes PC uses a netgear USB wireless adaptor and my laptop uses a Belkin pcmcia card. It was a dream to set up, very easy web based interface, also very easy to change firewall settings for different purposes, eg PS2 and son's PC using a webcam. Sharing printers also works effortlessly.
3 year warranty on the netgear kit and total reliability and great performance means I am happy with this kit and would'nt hesitate to recommend. A friend recently went for BT USB adaptors and a speedtouch 570 wireless modem router which by comparison, was a nightmare to set up (and keep set up)
i use a cheap router from dabs (only £80) manufactured by PTI. It has 4 wired ports and a plug in PCMCIA card to offer wireless capabilities and includes an ADSL modem. Was difficult to configure as user guides were not very good, but cheap aand can communicate wirelessly without problems in my house. Prices depend on the bandwidth. I find 11 Mbps (802.11b) perfectly fine for my small network (3 wireless computers), though for a larger network a 54 Mbps (802.11g) might be advisable.
The router / switch / modem is available by click here
As for buying products from the same manufacturer, i see no need. Most of my hardware is from different (the cheapest) manufacturer. As long as all hardware is compatible with the current standards (and it should be) there shouldn't be any problems.