Here are some prices from Cambridge Soundworks
Tower I floor standing speakers $999.99 reg $1499.99 Tower is a 3-way bipolar speaker with two forward-facing 8" polypropylene woofers, a forward-facing 5 ¼" polypropylene mid-range driver, and a 1" soft-dome fabric tweeter. Separate sets of gold-plated connecting posts, rearward-facing mid-range and tweeter units identical to those used in front.
The Surround 5.1 $199.99 reg 399.99 The Surround 5.1 Surround Speakers use state-of-the-art MultiPole technology, making them the ideal speakers for use with any surround sound system, especially Dolby Digital systems which send distinctly different signals to the right and left surround speakers. The MultiPole switch on The Surround 5.1 alters the directionality of the speaker, sending mid- and high-frequency output along the side walls (dipole) or concentrating this output toward the listening area (bipole). Mounting brackets optional.
Newton Series P1000 Sub $999.99 capable of rock-solid, ultra-high-output bass response down to 22Hz. Yet the P1000's richly finished cabinet is only 15.5" x 15.25" x 14". The cabinet encloses an awesome 1,000-watt B.A.S.H.® (Bridged Amplifier Switching Hybrid) digital amplifier and dual 10-inch subwoofer drivers. The Cambridge SoundWorks Subwoofer Control Module keeps the controls and connections conveniently near your equipment. You can even adjust bass output using an infrared remote control
Center Stage center speaker $199.99 reg $299.99 The dynamic range of the long-throw drivers is enough to handle the most demanding soundtracks, while dispersion is broad enough to cover all listening positions. A true value, the CenterStage can easily fill the largest of listening rooms.
This comes to $2399.96 before tax That leaves you with almost $2500.00 $2000.00 for a amp and $500 for speaker cable and interconnects