Power Conditioners Suited to Digital Front End

First, a question for you: what's your budget? Prices for power conditioners vary widely, so first you need to decide how much you can spend. Let the readers know, and it will help them to formulate helpful advice.

I want the cheapest thing that works well, but would pay $3000 if it was worth the improvement. I was thinking of a Power Plant 300, but am totally open to suggestions. I want to optimize the perfomance of by Transort & DAC. I did buy a $3,000 digital interconnect (Stealth) so if a conditioner made a real difference I would be willing to invest. I just feel a bit sceptical about the product category, but I'm open to new ideas on the subject. Thanks.

I've had great results with Audio Magic conditioners on my source/pre's.

I use the Power Wing from http://www.audioexcellenceaz.com/powerwing.htm with my Accustic Arts transport and dac.