wii wi-fi problems

[TWRoO]

What's 802.11n? is that the successor to g? We have the cheapest router I could find in PC World. £45 and it uses 802.11g and b. It works just fine, even with 2 laptops connected it doesn't seem to slow.
Like I said it does occassionally need resetting, but it only seems to be about once a month or so.