Originally Posted by LESS
I'm just buying everything one thing at a time as I can afford them. I don't plan to go cheap with any of my components.
I was thinking that I would probably need 2 subwoofers since it is quite a large area.
By the sounds of an earlier post, it sounds like you are going into the Custom Install/Integration business.
There are two things that are going to be very hard to overcome with regards to bass and your particular room. First thing is, your room is almost an exact square, which is about the worst you can imagine if you want to try to get even bass response in the room. Then throw in the fact that your seating is up against the back wall, and you are going to experience even more problems. There is going to be so much low frequency energy back there that it is going to be very difficult to get it to sound "right". This is going to be especially important if you are going to use this as a "Demo Room" for your new business. I have an installer friend (I am one too) who has a perfect square room and he just spent about $1200 on a Acoustics consultant (just to measure his room and get rcommendations) and he is going to have to spend a lot of money on room treatments and was advised that he will still have issues that cannot be solved. He too wanted to put his seating up against the back wall and has been advised against it. Multiple subwoofers will also help (at least two, but preferrably four).
At the very least I would think about moving your seating out from the back wall a couple of feet (which means a smaller screen in all likelyhood, 165" is already pretty big for a 17' deep room). Also, I would contact someone like GIK acoustics and have them give you some (free) advice on what to do with your room acoustically to help with your situation. They are very friendly and have solid products. I have also heard good things about RealTraps. You can also make the treatments yourself and save a lot of cash!
Sorry to be kind of a downer, but I figured you might want to make the best of it before you invest too much time, money, and energy, especially if this is going to be your business.