Why did you go with the C530 instead of the C550 (out of curiosity)?
And do keep us posted. I'm planning to buy a 32" TV soon (for PS3/blu-ray only, not to be used as monitor).
Most 3 monitor arms are in the $300+ range.
I think your cheapest solution would be to for 3 1-monitor arms.
Monoprice has a dual monitor arm for $40, but no 3-monitor arms.
Check these out...
I'd get the U2311H if I wasn't planning on playing games. But I am. And most people are saying it's a terrible screen to use with fast games (such as FPS).