I agree- the Sea & Sea housings for those cameras are great; definitely suitable for a serious shooter. They've got great ergonomic design and have some features you don't see on other systems, particularly their port lock system and shutter release (which is nice; you can trigger it in a few different ways), and a very secure latch system. It's also relatively compact among SLR housing choices, and easy to install/mount your camera in the housings. Plus, you have the option of dual strobes.
We're got a couple in our shop at good prices. Let me know if you have any more questions- shoot me a PM and we'll help you out.