Power Conditioning: Exactpower vs. Rotel vs. other


A question for those on the forum: I am currently running a PS Audio Duet as a power conditioner for my system (McCormack DNA-125 is the main power hog). I was considering an upgrade to a better line conditioner or possibly a power regeneration unit. Maximum I could spend is $1000, but was hoping to keep it around $500 (new or used).

On my radar is a used ExactPower unit, which come in at under $1000 used. My local stereo store also has a Rotel RLC-1040 for $500 that the dealer swears by, and says it is silly to spend more unless your system retails for $50,000 plus (mine is probably a $25,000 system at equivalent retail). It is what he uses at home in his very nice system with ARC Ref 3 pre and monos.

Any ideas about what kind of improvements I can expect with the Rotel unit over my Duet, or how much better the Exactpower will sound? My power locally is pretty darn clean: we live in a hydroelectric state, and our power is not far down the line from the dams.
dawgcatching
I went from a Duet to an EP15A....bass tightened up and sound got cleaner but not hugely but I could hear it...I got the EP because I run tube gear and wanted something that kept the power at a steady 120 volts...my local power drifts a lot and this device will extend the life of my gear...I don't need to bias tubes much anymore....it's expensive but made like a tank and doesn't seem to affect dynamics like some have commented with the PS Audio Premier.
Post removed 
I built a power conditioner using an isolation transformer with balanced outputs for about $400. The improvement was superb. You can read about it on the Plitron web site. I would recommend going for the "low noise" version transformer. Commercial units go for $2500.