I'll second Neat Video. Amazing noise reduction, and tons of control.
On the FX Factory side, Nodes is great if you can afford the price and the time to invest in the learning curve. Lots of fun and can bring that bit of cool extra to any motive n graphics you do.
Also, if you don't own a copy of Motion, I'd highly recommend it too. Is it as powerful as AE and other tools out there? No, but it is very quick at certain tasks and can't be beat at its $50 price point.