Yeh, wrong section, but what the heck.
Personally, if you don't have a reason to go wireless, I wouldn't bother. If you have a laptop and wish the freedom to operate from any place in your home, then maybe. If you're talking about using a wireless keyboard and/or mouse, that's a personal preference and does give you some mobility.
I use Belkin's PCI card and router setup, but only because the cable modem is in one place with the tv and pc is in another room. As for problems, Belkin's setup has 11 channels to choose from if I have an interference problem. Most probably do. There is one that could be a problem for you. The cordless phone frequency of 2.4 GHz. If you have a cordless phone, just get the wireless system that does not operate on or near that frequency.
As for tutorials. I would Google for them and look at a few covering the latest standards. Or go to the different manufactuer's site and check out the specs. Walk into your favorite store and ask salesclerk's preferences. Just don't buy on what they say. Read the specs on the boxes after doing some research.
Probably missed something here, but which to buy or even to go wireless is up to you.