PC suggestions for a Gryphon Diablo 300

The power cord you are using (Cerious GE) is very good, there are other power cords out there that might sound a bit better such as the New Cerious Matrix power cord, the Furutech DPS-4 and/or other brands. This is just a guess, however, I don't think that because Gryphon makes a power cord (or has one made with their name on it) that it would work any better than other brand.
Also, I agree with williewoka, with a really good amp or integrated amp I've havent heard much difference in sound using various audiophile power cords.

Interesting comments on powercords having less of an impact on amplifiers versus other system components.     
I currently have an Ayre KX-5 Twenty preamp and VX-5 Twenty amp.   I've noticed that while the KX-5 is definitely affected by powercord changes(the Cerious GE sounded the best), with the VX-5 I noticed little if any change at all between powercords.  (My Gryphon is due to arrive in a couple of weeks.)

With that said it may make more sense for me to save my money on the powercord and use it toward Speaker and IC cables.   This may have more of an impact.   Currently I have Wireworld Eclipse 7 throughout my system.

Appreciate the comments!

@rshad0000 - I'm not surprised by your findings with your amp/Pre-amp - others have reported similar findings

RE: speaker cables and IC's - the best commercially available cables I have tried are from KLE Innovations - I have reviewed most of theri product line and found them to be excellent.

http://kleinnovations.com/

Checkout their reviews.

They are a little on the expensive side - BUT -  they are probably the last cables you will buy. 

Good luck - Steve

I've not heard the KLE Innovations speaker cables or interconnects but as williewonka knows I'm a huge fan of the KLE Innovations bananas.

With that said and I'm sorry for kind of repeating myself, I'd take a serious look at the Cerious Technologies Matrix interconnects and/or speaker cables. I own the Matrix interconnects and they are very good. Audiophiles I know and trust say the Matrix speaker cables are awesome.

I'd like to demo the KLE Innovations speaker cables and interconnects (good products, I'm sure) but there is no way I can lay out the cash for them in order to demo.

Thanks lak.   Robert at Cerious Technologies has always treated me really well.   I may give his SC and XLRs a try.  I've been impressed with his GE Powercords.    
I've also always wanted to try Nordost as well....Pretty pricey though.