help me improve my sysyem

I don't think that anyone has said you have too much or too little power. I did say you had a massive amount of power however I was not trying to say you had too much. I am saying this, I would rather have 50 super clean watts of power than 150 watts of average power. This is not to say that the Adcom power is junk but to say that there are some 50 watt class A amps which are better sounding. My experience is that a change of amps made the most impact on my system. I found that a change of preamps made a change but not as much as the amp. BTW I changed from Adcom GTP-450 to CJ PFR so I am familiar with Adcom. My son also has Adcom and is very pleased with it. I have been pleased with the pieces I have had. Wires make a subtle change, but I think your system seems to be balanced in that area which leads me to the next question. How do you have the amps connected? Could there be a problem in the amp setup?
As far as power chords and interconnects are concerned, you will find plenty of people on both sides of the issue. Some will say you need them, some not. If you want to try them Audio advisor has a 30 day $ back warranty.

I would replace the Monster HTS 5000 with the much better sounding and cheaper ($130) HTS-2000.

Take a look at the www.hcm.com site and follow to the Sonic Horizon site. They have a number of power cords at different prices from $89.00 to $499.00 and they have a 30 day trial with a full money back guarantee. Plus they have some great deals on some Audioquest and MIT power cables. Two years ago I had a set of Acurus A-150 amps with an Adcom preamp. The sound was pretty sharp and a set of Harmonic Tech AC-11n power cables mellowed it out very nicely. If you are basically happy with your equipment but would like to improve and refine it. I did have good luck with improving power cables. Plus there are many used power cables here at Audiogon. I wouldn't think that you have to go too high up to get an improvement on it. But it is worth the try.