Power Cable or Power Conditioner?

I don't know where you live but in most places the power company doesn't consider voltage fluctuations of twenty volts to be excessive. Your equiment will work under these conditions but it will be handicapped by what's coming in the wall.
I know it's not what you want to hear but I think you will be much better off to bite the bullet and go for the ps audio P300. Regardless of what comes in the house the ps audio will constantly supply you with the power you need. I don't know enough about the Monster power conditioners. I looked at them once at a stereo shop but wasn't impressed by them or the salesman. I'm not sure the perform the same function.
Actually I built another power cord yesterday. I only needed a four footer and I calculated the cost to be about $46. I've seen and heard a lot of power cords and I know you would have to spend over $200 to better these cords.

In your price range, the Tice Solo AV is a great product. I would start there and then try some cords as your budget permits, as the cost of three decent cords will add up fast.

I second the above. Get an A/V Solo and as soon as you can get the power amp out of there. I bought a Tice PC3 power cord for my power amp and the difference is HUGE!

The A/V Solo is really good but it's definitely entry level. I use two isolation transformers in series for my digital. One is plugged to the Solo's digital outlet and harbors my CDP and another transformer which in turn isolates my DAC. It works wonders.

Regarding Stehno's post, most inexpensive AND expensive power conditioners sound bad. And the lowest cost Shunyata cords sound better than cords costing a lot more. Anyway, I'm just trying to help Squiddy by giving him another point of reference. If Stehno thinks all the expensive power conditioners and cords are just great, he should go back to his Kenwood/Bose 901 system and Britney Spears CDs and enjoy.

Ah the controversy..gotta love it!