Nice looking meters!!
For me the latest and greatest is a used PS Audio P600 power conditioner. An Imposing beast
(I cannot load pics with Internet Explorer 9

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Anyway, this monsterous beast is huge. 9 " tall, 17" wide, and 20" long
I am trying to decide where to place my latest Power conditioning toy.
Myy list of conditioners grows:
Adcom 315 (not in use)
Monter 5000 (not in use)
Monster 7000SS (for all two channel digital)
Monster AVS 2000 (not in use)
Furman REF20i (Amp and all video)
PS Audio PPP (not in use)
PS Audio P600 (preamp and phono) planned
The P600 has a unique feature of being able to adjust the regenerated frequency of the output anywhere from 60hz standard up to 120 hz.. so it can have a unique influence on the sound. I bought it just for this feature. Used via AudiogoN, was near enough to go pick up. A good thing c'uz shipping this giant thing would cost a lot. The carton is double boxed, with an 80 lb monster in it.
Added: a day later: I cleared off the main rack cuz' trying to move it with the stuff on it is not possible. So i moved it a total of FIVE inches!!! So the giant fat monster of a conditioner The PS Audio P600 can fit and have room to throw off it's reputed blowtorch level heat. Hopefully it will not get too hot as i do not plan on using it for an amp power conditioner.
So as long as the stuff was off, i started a project I have wanted to finish for a long time.
I am adding antistatic foam to a bunch of stuff. Including the PS Audio P600. I added it to my Sony SCD555E under the audio boards and at the outputs. I also did my Monster 7000SS powerline conditioner. i still have a few items to work on. It also helps to get the Cockatiel dust off everything. My pet Cockatiel sheds boatloads of dust, like dusting powder. (they use it to lubricate thier wings. My guy flys a lot, so spreads it everywhere. in a month it looks like i haven't dusted in twenty years....)
The curious thing is i am using my SCD555ES via a cheap computer self powered speakers while my system is in pieces, and it sounds pretty good, considering it has a very expensive power conditioner it's through.
Hope i finish tomorrow so I can go back to normal listening.
But then i want to move the video rack five inches too.... groan.