Wireless is a bit underrated, really.
I've a line fault in my house, and can't get ADSL working here, so I've been on iBurst for three years or so. I have higher pings than fixed line users, obviously, but at around 75-90ms locally, it's not really an issue at issue. Anything up to 300ms is, despite what anyone might want to tell you to the contrary, quite okay for gaming.
Of course, reception strength is a significant factor, though. I live in an excellent reception area for iBurst (there's a base station a few blocks away).