I went with way cheaper stands too when I first set everything up. I think I paid $89 (US) for each stand I have now. They work pretty well. No complaints except for weight maybe.

I will not be upgrading real soon either. I am still trying to decide if I want to go down to 3 27' monitors and lose the other two.
When I moved up to 5 screens it wasn't necessarily for boxing, though it was a please, but for work. Now that I don't do much Flash or IOS I really need 5 monitors.

And going to only 3 monitors simplifies things greatly.