The most important thing, especially at your price point, is the room. And there you may be in luck.
The ratio 1 : 1.56 : 1.87 simulates VERY well at 50 cubic meters. You don't have that - only about half. Still, it's a better bet than anyone has a right to expect. I suggest reducing that 84" width to 77" with some thin bookshelves, which gives you 77" x 120" x 144".
Caution: a half inch, even a quarter inch, matters here - I just finished a room to 1/8" tolerances, and it's the best room I've ever heard. If you want to know more, PM me.
The ratio 1 : 1.56 : 1.87 simulates VERY well at 50 cubic meters. You don't have that - only about half. Still, it's a better bet than anyone has a right to expect. I suggest reducing that 84" width to 77" with some thin bookshelves, which gives you 77" x 120" x 144".
Caution: a half inch, even a quarter inch, matters here - I just finished a room to 1/8" tolerances, and it's the best room I've ever heard. If you want to know more, PM me.