Power Cables


I am currently upgrading my system.  I had a pair of XLO Ultra speaker cables sitting around and was very impressed with the improvement over the original Monster cable.  Having come back from Axpona, I am wondering what fellow Audiogon members would recommend for a power cable with tight bass, superb mids and extended highs that would help to produce a very full, wide and deep soundstage.  I am looking to replace the cable on my Adcom GFA-5802.  I do agree with philosophy of starting with the power.  I have demoed one other power cable and the difference is immense.  Thanks in advance for the advice.
spipa
@bacardi,  Very interesting; the Equi=Core 50, 150, and 300 models are rated in watts. I assume this relates to the transformer box.
How do you choose a cable for low-current components based on watts?

I can only say that I have a 150 on my subwoofer(Rel G1) that I can't take off. I do have an Equi=Core 300 from my dedicated 20amp Furutech GTX-D rodium wall outlet to my 6 receptacle line outlet that everything in my system plugs into. I am awaiting two more 150's for the rest of my components. 
I do believe the watts are a general guide to components wattage that each cord can handle in sum.