It is New Years Day, most of us are just getting over our hangovers.
Krelldogg is right, a budget would be best to know in advance. For movies I think the older Krell like the Fortes are great for movies and can be had for $350 to $450 a pair.
If your using a 32" TV then a center is not necessary. It is said that the center is the most important speaker in a HT but that is only because it anchors the dialog to the screen. If you have a really big screen then it matters but 32" would be fine without one. You could use your 2 channel speakers for the front and just add surrounds and a good receiver.
If you would like to keep the systems seperate I would say a used Denon receiver, HSU or SVS sub and say some Klipsch Forte Speakers and some Klipschs surrounds. With some luck you should be able to put together a good used system for under $1,000.
My brother has the above system and it sounds very good so I speak from experience.