Do I need to upgrade from my PS Audio dectec?

Have you noticed a lower noise-floor with the Dectec when it's in the system? If yes, then maybe it's time to move up to a higher-end conditioner. 

+1 for Core Power Equi=Core from Underwood. Very effective in my system for lowering noise and revealing detail in music. And a dedicated AC line from service panel to audio system should seriously be considered.

and a dedicated like doesn't allefiate [sic] the need for power "conditioning". 

Agreed. But removing the audio system from shared AC lines helps remove noise from appliances such as refrigerator, washer/dryer, air conditioner, possible ground-loops.