You could do worse than that, especially for the price.

However...
I'm not
sure, but you might find two 500 watt lamps to be a bit overpowering in smaller rooms, so be prepared for some rather contrasty shadows, even when using the umbrella.
Chromakey lighting is pretty tough, and I don't know how much of an improvement you'll get with that setup. The goal is to light the subject completely separately from the colored background. So for your subject, you should MINIMALLY have a key light and a backlight (important for good separation), which takes up all your lights. Ideally you would also have a dimmer fill light, but I digress.
To light the green/blue background, you might consider buying some work lights (cheap, ~$30.00 US) for a nice broad coverage. BUT when you're doing that, you have to be aware of what kind of lights you have. Those lamps you linked to are tungsten (pretty warm color temperature), and I think a lot of work lights these days are halogen, which has a cooler color temperature. I'm saying all this because if you mix tungsten (for your subject) and halogen (for your background), if you white balance for your subject, your background won't look quite the right color, and if you white balance for the background (for a better key), your subject won't look right.
So! Long story short, be careful when you mix lights, which has nothing to do with your original post.
