Steelseries here as well, and I love it. I'm sure I'd love the Goliathus and anything similar, but after using that I hate my cheap ass mouse pad at work.
Side note, the one at work is one of those ones with the ergonomic bump that you rest your wrist on. I have to turn it sideways now though, because a few years ago I started getting wrist pain. Thinking it might be the beginnings of carpal tunnel I had it looked at, but it didn't seem to be that. Doctor asks me if I use one of those wrist rests and I tell him about my mouse pad. He tells me to get rid of it, so I turned my pad sideways and it went away in a couple weeks and has never returned.
I'm not a doctor, and I'm sure they help some people, but if you have wrist problems and use one, might want to try it without for awhile.