if laptop is very close, maybe no walls in the path... then 11n in the laptop and a decent $75 or so WiFi router, marketed as 11n 300mbps, would be a good choice. I'll stop short of a recommendation (see reviews on this forum/main page). I would personally advise against D-Link and most Netgear. Personal opinion due to a too-high percentage of badly designed products over the years. Yes, some are good, but on average... but too, if you buy from a decent retailer (that leaves out Best Buy), you can return and buy some other brand.
But if the laptop is just doing internet activities, maybe streaming netflix, 11g with a good signal is fine.
Mixing 11n and 11g is only an issue if you have user devices using both standards concurrently mean at any fraction of a second - such that both 11n/11g are competing for air time at the same instant, and this recurs very often in any second or two. Such as two devices, 11g and 11n streaming video beyond 1-2Mbps that netflix type streaming needs.
Last edited by stevech; 01-11-2013 at 12:13 AM.