UPS

A lot depends on how is your incoming power to the UPS. I have come across problems with not-so-steady voltages & also frequency! Frequency flutuations are quite rare but very problematic!
If u get power from any alternate source like generator, then you can notice the frequency problems quite easily.
MGE UPS are good for servers apart from APC. APC is quite well-known and quite reliable brand of UPS as well, maybe u dint have a good experience with them in past, but both APC & MGE are good ones to check for.

Tripplite is one of the most reliable UPS I deal with.

I need to know your KW requirements before I can help to more detail. Need to know how much of a load you have and how long you wanty the backup power to last.

I'd get either APC or tripplite. sola very well respected also. don't know mge. get one that is 'smart' and has a cable to pc so it can shutdown the pc if power fails...get one that can protect your modem and network cables also...is this for home or network?
the other thing to look for is whether the power fed to the pc thru the ups is coming off the battery ('instant switchover') or the ups has sensing circuit that switches from line to battery when power fails. i like the ones that feed from the battery as seems to me would have some power line conditioning properties that way.
also, check to see if all the outlets on the thing go thru the ups. sometimes they just are 'extension' outlets and don't provide battery backup. very annoying. i plug those with 'don't use' plugs.
when you get your new ups, after it charges for a day and you have it all hooked up, pull the plug from the wall to the ups and see that puppy warn you and then shutdown the computer (test it, see?)
any ups isbetter than nothing but don't skimp if you can afford it. i like APCSmart500 like mentioned previously also. check out Sams club or Costco for good deal...

Might as well throw my opinion into the pot! :)

By far, I have had fewer difficulties with APC and TrippLight. APC, though very commercial as previously stated, is still a superior product. In fact, I have assisted in a few implementations where my input was requested and taken, these systems have experienced NO downtime despite the number of outages the building has experienced. This is using an APC SmartUPS XL for Networks and servers. If memory serves, the model was 2200 or something. They are also using a Symmetra for their data center. Not a glitch.

As far as TrippLight goes, although I've not had much commercial experience with them as personal, what experience I HAVE had with them are positive as well. Case in point, a few years back I purchased a personal "cube" model which served me well for quite some time. When I purchased an APC, my son then used the TrippLight which just RECENTLY failed after 1 min into the outage. However, note that it had served me for a few good years! :)

Still, APC is the way to go for me.

Regards,
Jesse

I'm not familiar with MGE.

SOLA however has been in the power protection business for ages.

Every SOLA system I have used has been built like the proverbial brick s***-house.

However, they are going to be more expensive than an equivalent sized APC or Tripp-Lite.

SOLA concentrates on the low volume commercial market. Whereas APC and Tripp-Lite are primarily in the user markets.

Chas