I need some help in selecting the best router for our wireless setup. I have never setup a wireless network, so please forgive if I am a little lost. I have an older laptop, HP Pavilion ze4400 (windows xp) and a brand new gateway (windows 7). The gateway has a built in wireless adapter. The HP came with an 802.11b cardbus thingy. I have been told that an N router is the best, but I am concerned that it will not work with the older HP. Will an N router be backwards compatible with the b? If not, can I just buy a new adapter for the HP? If so, what router and adapter should I select?