Just a comment from a diehard wifi'er...
Stay away from linksys routers; D-Link aren't bad (though I suggest the extended warranty the seller will offer - saved my arse 3 times now); Belkin has become my favorite by far.
Once you go wireless, have a look at the newish wifi printers, you'll never realize until you've used one, how nice it is to park that printer away in a closet somewhere not have to plug in, just click print, go and collect the printout
Other than the price of new replacement cartridges, I love my z1400
As for laptops, check out laptop depot / computer trends, the refurbished ones are a deal (mine is "refurbished" due to a blemish on the stainless trim)
My .02