No problem!
I have personally never ordered through Cardomain/Sounddomain. I haven't heard much of any positive feedback about them. Mostly what I've heard is that either the products are damaged upon arrival, or they take
forever to arrive. Never ordered anything from purecaraudio.com
I strictly do my car audio purchasing either through e-Bay (the same headunit you buy in stores can be purchased, no exaggeration, sometimes as much as $200 less on e-Bay), or a local car audio store back in NJ. I've done a lot of business through them and they are a terrific operation. Everything is done professionally (installations), and their deals are excellent. They never try to rip you off or fool you into buying crap you dont need or that isnt any good.
My two cents would be to find exactly what you want online, search for it on e-Bay, and get it through there. Yeah, you have to wait for shipping. But saving a hundred bucks or more is certainly worth it, especially when you're on a tight budget.