bad sub just kills anything, even you limit to below 60hz. there is NO cheap sub (<$500) produce acceptable sound.
projector is a must, you want at least 100", right : ) Screen might be expensive, but you can use goo system paint at the beginning if you did some paint job.
room HAS to be acoustic treated, or you just waste your money. simple ways like, cheap rug over the floor, thick fabric curtain (fake one is ok), home made bass trap, home made sound absorber in ceiling and walls (at least remove 1st reflection)...
projector is a must, you want at least 100", right : ) Screen might be expensive, but you can use goo system paint at the beginning if you did some paint job.
room HAS to be acoustic treated, or you just waste your money. simple ways like, cheap rug over the floor, thick fabric curtain (fake one is ok), home made bass trap, home made sound absorber in ceiling and walls (at least remove 1st reflection)...