What do PC world know at all?
We called in there to our local branch just a couple of weeks ago with a similar request (we have 2 PCs a mac and a laptop) and going wireless would've been good but for the oft confusing and conflicting advice offered by the no-brains in PCWorld.. (not that all the staff are the same..! some knew less than the previous member of staff.. LOL!)
We even went into Manchester to the Apple store there... and no way.. too expensive!!
Anyhow.. we've got 2 PCs set up to a Linksys wired jobby that seems to do pretty well for now... but the mac has 'Airport Extreme' on it which means it does have the capacity to pick up wireless internet connections (cos we tried it) and our intention (when we asked) was 'Ok, so we hard-wire a PC to the router and then the other PC will be rigged up to be wireless and the mac..' - and thats when we lost all hope with PC world... we never got as far as the laptop :-p
But I'll take the advice here and go with another Linksys (they are good, aren't they? and I'll let you know now that I took advice about routers here anyway first time round and I'm not complaining!)
We're turning one room into a studio and need a computer in there and it needs connectivity and I want to be a lazy oik with the lappy....give my ancient PC a bit of a rest lol...
It'll be a few weeks yet before we make the plunge and get the router we want as it does seem that we need to gear up our PCs first with the stuff to be able go wireless (and it could finally mean I can change the living room around a bit and hide some of those bl**dy cables!!!)

Any good suggestions on that? I have one spare pci slot on my pc and I'm not entirely sure about the new comp.. the laptop has the thing for wireless but no card and the mac just *works* (it's surprising how many unprotected connections we picked up with it too... bloomin' prostituting mac!)
Any light shed would be appreciated.. screwdriver and the intelligence to connect to stuff are all in place ready..