Buy the most expensive UPS that CompUSA has, that should be fine.
If you want to math it out, add up all the wattages of the devices you need to plug-in to the UPS then make sure the sum is less that the capacity of the UPS you buy.
Also, your Mackie and studio monitors don’t need to be on the UPS, nor does your video display, but you’ll want your main computer monitor on it so that you can see to close all your applications and shut the system down.
I always buy APC.
— Wes Plate
Automatic Duck