Unless the room is the proper shape and has the correct waffling, then just about ANY system will work. We have odd shaped rooms and got a system from the home shopping network for less than 200 dollars and it works fine.
We had tried out a friends custom system that was more than 3k and this one sounds the same with what we have to work with roomwise. The only thing you might need is a preamp and a better woofer than the cheapie systems have. Don't go by more $$ means better if you don't have the room for it.
Oh and remember large woofers can and will pop the drywall nails out. lol The old man used screws on ours but the friend with the custom system bought his place and it was nailed. lmbo