I plan to spend $1500 - $2000 on the speakers and then another $1500 on subs.
I'm not going to make the usual type of recommendation: my recommendation is based on my significant level of perceptual research and how it relates to human auditory perception vs. measured/verified 3rd party analysis. As such, I can assure you that my recommendation will be among the best possible for the money involved, unless you have hearing damage or defects, in which case the auditory research is not reliable for these unusual cases.
Please look up my posting history: my recommendations/advice in regards to speaker systems is very carefully made.
For the speakers, buy a discounted set of 5 Paradigm S1 v2 speakers. These use a rigid, relatively non resonant solid cast aluminum cabinet with dense molded in bracing(
far better resonance behavior than most speakers - a critical feature for transparency). These speakers also extraordinary flat off axis response, which is also critical for sound quality as demonstrated by the credible perceptual research. None of the other speakers usually recommended here can compare.
For the subs, get two matching subs, with verified high performance by 3rd party analysis, such as
any SVS subwoofer model(
this company repeatedly proved to be of extraordinary performance for the dollars spent when measured/analyzed by credible 3rd parties). Place the subs, one in left side of room, one in right side, crossed at 80-85 Hz(
assuming your crossover is 4th order, which it will be if it is a modern Yamaha unit, as example), with each sub located within a 6' radius from each Left and Right channel speaker, respectively. This will insure ideal seamless integration. At least two subs is very important for seamless integration. Also, the more subs you use, the more even your overall room LF response will be if you place them in ideal positions.
-Chris