the rear speakers are designed to sit on anything so they can blend into the background--I have mine on the window seal. Both of them needs to be plugged in, so keep that in mind when you are looking for a stand. Overall the Q990D is great and I could not be happier with it.
Watch "desk+mount+speaker+stands" on Youtube. Maybe there's something suitable for you. Or it might give you a few ideas. If you're handy, build something yourself.