Armen is right; Eclipse faceplates cannot be removed, but a thief cannot use it if they do steal it. Unfortunately, most thieves are not aware of this "feature" so if your average car stereo thief steals your deck, too bad. Eclipse will replace it if it a thief brings it into a shop and if the shop reports it, but you may be waiting a little while for that to happen, or until the thief just chucks it in the nearest dumpster after they can't figure out how to run it.
That said, I own an Eclipse and it is the best head unit I have ever used. It sounds fantastic and does not look so flashy as to be the type to easily catch a thief's eye.
For speakers, all of the ones that you mentioned would most likely need an outboard amp to adequately run. I run Quart separates in the front, BA 6x9s in the rear, and a JL Audio sub. I also have three amps. If you are on a budget, I would recommend a Sony Xplod 4-channel amp (available at Best Buy or Circuit City) and some Boston Acoustics speakers. Paired with an Eclipse head unit, you are in business. If you want to add a sub later for a low price, add a one-channel Memphis Audio sub amp and a 10" or 12" Orion XBR sub and you will have a killer system then for not a whole lot of money.
Georgia fucking RULES!!!! I'm never coming back!!!