I'd be hesitant to spend extra bucks on a Wireless N router at the moment. The spec for the protocol hasnt been finalised (expected March '09). And while they be morons to finalise a spec that isnt compatible with all of the Wireless N gear thats been sold already - keep in mind that hardware you buy now might not be fully compatible with all future stuff.
Also, be warned if you're buying a new home phone to stop the interference with 2.4GHz cordless phones (same frequency as Wireless A/B/G) - the Wireless N will be on a 5Ghz and/or 2.4ghz frequency range, which may clash with the flashy new 5.8Ghz cordless stuff thats out now. Stick with 1.8Ghz phones as they suffer from the least interference from Wireless networks, Microwaves, etc etc... They have better range and comparable voice quality in most cases anyway.
If the wireless N stuff is only a few bucks more, future proofing might be a way to go. But i wouldnt spend heaps on it at the moment.