If I buy an N-router???

If I switch from using a Netgear b/g RangeMax router to an N-router something like this:

http://www.newegg.com/Product/Product.aspx?Item=N82E16833122235

will my Xbox wireless adapter stillhave aboutthe same speed? As long as its the same, I'd like the N-router to get better and faster laptop connectivity. Any opinions???

I'd like to stick with Netgear since that's what I've always used and had good success and little to no problems whatsoever, but man there are several to choose from:

http://www.newegg.com/Product/Product.aspx?Item=N82E16833122235

http://www.newegg.com/Product/Product.aspx?Item=N82E16833122220

http://www.newegg.com/Product/Product.aspx?Item=N82E16833122224

http://www.newegg.com/Product/Product.aspx?Item=N82E16833122320 or this even though it's just a boosted b/g

Which would be best in my situation? I hardwire my desktop to the router, then wirelessly connect my xbox 360 and one laptop. Distance typically is pretty close (normally within 30 feet or so)