Well, if your willing to pay for awsome sound then I suggest you go for Orion speakers. They are double the price of most good speakers but they truely are amazing. I woun't get into details but if you went with an eclipse deck and orion speakers, it would sound beautiful.
Don't let the sound guys at Best Buy (or where ever you go) try to tell you anything. Generally, they can't tell the difference between a sub and an amp. Try to find a place that has some knowledgeable staff.
