This is a good question and I would approach it differently. Instead of $$$ what should you make your priority? Speaker placement is much more important than speaker cost and its free. I would priortize as follows if it was my decision:
1) The room
2) Speaker and speaker placement
3) Power
4) IC's
5) Components
If you get the items at the top wrong the money you spend at the bottom won't save you. You get them right and you can save $$$$ on the items at the bottom IMO.