Few more things:
Since you're going to be connecting to a phone like, I assume you have ADSL broadband. Basically, this is any type like BT, AOL, Tiscali, etc. It isn't cable broadband, from the likes of Virgin Media.
If it is ADSL, then make sure you get a router + ADSL modem in one. Most ADSL modems supplied by ISPs won't connect to standard routers.
Range of wireless depends heavily on your surrounding. It will be reduced, due to interference, if you live in an area with lots of wifi signals already. Also, the signal will have a harder time getting through very thick walls (and especially those with metal inside them), than the regular bricks walls most houses today are made of.
Wired is better than wireless in every single respect. The only advantage wireless has is that it's useful with laptops, or places where it's hard to lay down cabling.
If you just have desktop machines then just go for wired, if it's convenient to lay the cables down (perhaps between rooms?). Otherwise, go for wireless.
I'd actually go for a wireless router anyway, and perhaps just switch the wifi off. That way, if a friend comes round with their laptop, you can always turn it on to let them browse the net.