[Nut-upsuser] Recommended UPS to buy for use with NUT?

[Clay Barnes]

I am running a home box (600watt total load, may expand to 800-900) and
I need a UPS that can sustain power to that for at least 20 min, but
I want as much time as I can get.

Does anyone on the list have a similar setup with a UPS that was easy to
set up with NUT?

Generally speaking, what mfrs. and models are very well supported?
Which should I avoid at all costs?

I know this seems like something that would be in the archives, but my
searches thus far have been fruitless.

Thanks in advance!

--Clay