I agree with Michael, I haven't ever needed to look further than Middle Atlantic Products or Furman, but I've also recently come across Snap AV and have had good luck with them.
If all of your power is off the same circuit or just a few circuits usually use
MAP's PDC915 .
If you're distributing to more areas, start with
MAP USC6 and add remote relays from there.
I really do NOT like
Furman's PS8R. It works fine but the large orange power button powers off the whole unit WITHOUT executing the sequence, the much subtler black button is the sequence button. Dumb.
If you want to get even fancier MAP has some IP based power sequencers that I don't have any experience with personally, but would trust based on good experiences with the brand. I have used some from Snap AV that I've been very happy with based on performance, product selection and price. For instance their rack mountable UPSs seem to be the exact same as MAP's model but costs much less.
Snap AVHope this helps,
thomas d.