It is amazing how much grunt you need to keep these things alive.
I hope all your equipment isn't too close to your living area? You may need to get a EMF meter to just check out how much you are exposed to, hence radiation. I may even have to check my home now as I have a 1 1/2 year old to protect also.
Do you get a large elect bill from all your equip you are running? If this is business it's not a problem but home is different.
I noticeed on the instructions of the smaller unit that it recommends not to run printers off it, I never looked into why and hoped it did not include modems
One of the first things I did was unsolder the annoying beepers on both units, I would hate to have to put up with that at 3AM!