Buying tickets through Ticketek.com is fairly easy. You can either print them out at home, get them mailed to you, or pick them up from the venue.
I bought my tickets at a Ticketek outlet in New Zealand as I didn't have to pay postage - but it was probably harder than purchasing them on the net as the guy had no idea what he was doing and didn't even know they could sell me tickets through Ticketek Australia until I told him.
So stick with Ticketek.com and you should have no problems