Wireless router/firewall

Does brand matter?

[Westat1]

Now that I am all but resolved in to going to a wireless network, I have been researching routers/firewalls. There seems to be a great disparity in pricing as well as features. I have read there really isn't a need to spend more then $100 on one, is that true?

What features should the device must have?
IS WEP security a must have, or can it be added on?

Any brand/models recommendations are appreciated

Again forgive the naivety of such questions and I appreciate your help

[Westat1]

Twp more questions, (couldn't edit the orginal post)
do you need to have the same brand router/firewall as card for laptop

Whats the difference between the USB Adapter and the card?

Thanks again.

[DaveAtIFG]

PC World and CNet both offer articles and product reviews that should offer some insight to your questions. When they both endorse the same product it's usually a winner! :) This CNet page [computers.cnet.com] offers good basic info.