Too much power?

Forgive me for what is probably a silly question.
I've been out of the entry level audiophile scene for nearly 17 years and I'm not sure about the set up I'm currently running as I had to replace my mains.
Long story, short, I had a pair of M&K S-125 speakers stolen 2 weeks ago when my house was burglarized. I decided to try something different and bought a pair of Definitive Technology SM45 speakers. I'm powering the SM45 speakers with a Parasound HCA-3500. I'm using an old Yamaha RX-V592 as a preamp. Between the Yamaha CD player I installed a Musical Fidelity X-ACT DAC followed by a Musical Fidelity X-10D (for a little warmer sound). All cables are by Monster Cable.
To me it seems that I may have too much power driving the speakers. The reason I believe that is that the volume dial does not have to move more than 75 degrees up from 0 to have the system on the loud side. The speakers are rated at 150W and the amp is rated at 350W.
Am I over-driving the new SM45 speakers?
Should switch over to the Carver TFM-35 I have powering the M&K S-80 center speaker?
Your thoughts would be appreciated