I have no idea about parkervision, but ..
All i can tell you is .. do NOT purchase a linksys WRT55AG
I got one to replace my WRT54G, but it's got the buggiest firmware ever, and Linksys wont update it or give out the super-sekrit beta firmware for it. Not to mention the range on it SUCKS (I shit you not, 35 feet it still has a "good signal" but gets
heavy packet loss!). In fact, dont get a linksys router at all. Their tech support blows. I submitted a tech support request, they said they'd send me the beta firmware, and never did. I emailed again a week later and asked where it is, they said to wait. Right. Two weeks later they close the support request and say it's resolved. What the fuck did they resolve besides getting rid of a customer?
I will say that my D-Link DI-624 is far better than any linksys router I have ever owned (one or two before the WRT54G). UPNP works visibly, it has better firewall rule settings, I've only had to restart it once other than configuration settings (I had to restart my linksys routers every couple days), range is perfectly acceptable, ...
Anyway, just thought I'd share my experiences. If you dont go with a d-link or a linksys I have no personal experience to help you
