Update from Wharfedale!

Hi there guys

I have a set of Wharfdale Diamond 9

Fronts: 9.5
Center: CS
Surrounds: 9.1
Subwoofer: SW 150 (keeping this one)


What I want is to update to a better set, and better sound of course!

Tell me what you think

Anything?

At least is it worth changing the CS with the CM?

Here are their specs

CS:
Speaker System

* Speaker Type 2-way - Passive
* Response Bandwidth 70 - 24000 Hz
* Input Impedance 6 Ohm
* Recommended Amplifier Power 20 - 120 Watt
* Sensitivity 89 dB
* Crossover Frequency 2800Hz
* Magnetic Shield Yes
* Connectivity Technology Wired
* Detachable Grilles Yes
* Additional Features Gold-plated connectors, Bi-wiring


CM:
Frequency response 70Hz-24 kHz
Driver complement 1'' soft dome tweeter; 2'' soft dome midrange; two 6.5'' woofers
Nominal impedance 6 Ohms
Sensitivity 90 dB
Recommended amplifier power 30-150 Watts
Cabinet finishes Vinyl
Dimensions 8.75'' x 20.2'' x 10.5''
Weight 22 lbs.
Operating principle -
THX certification No