Seriously.... Get 3 pairs of Behringer B2030P 2 way monitors :
LINK : ($150 per pair) + 2 of the Dayton 12" powered subwoofers :
LINK : ($80 each on sale)
All you need now is a decent home theater receiver with a decent built in active crossover. Set all speakers to SMALL and set xover to 80-100Hz and you will be good to do. Since you will have two subs, one on each side of room, 100Hz is a better choice for crossover point selection.
No how, no way, are you going to get anywhere near the performance for the dollars spent buying new equipment if you choose any other 2 way speakers.
If the speakers are too large or ugly, you can substitute them with Infinity Primus P152 2 ways. These may cost a bit more - but are smaller and offer great performance for the $$. They don't have the superb wide dispersion, extension, smooth treble or dynamic range of the Behringer units, but they are smaller and look better. You need to use 100-120Hz crosover point using these speakers if you want to have ability to do considerable dynamics in movies. With the dual subs - 120 Hz is not a problem. Just keep each sub within 3-4 feet near each main Left and Right speaker.