I have had two very bad experiences with Systek. I have two dead Systeks in my home right now. First one I bought in 2003 or 04. It failed more than 6 times within warranty. After the warranty expired I dumped it.
Not having learnt my lesson from Systek, I bought another UPS from them in 2007 or 08. This 1KVA UPS didn't hold up too well to fluctuations in electricity. Mosfets kept blowing up regularly due to fluctuations in electricity. Every time the repair guy came, he blamed it on power fluctuation. I told him nothing else in my home has broken down due to power fluctuation except for this good for nothing UPS. There was another issue with this UPS... sometimes when the power came back on the UPS would not switch back to mains, it would keep running on battery and draining it completely. I had to turn it off and then on again and then it would function normally. I complained to Systek several times regarding this issue, however they could not reproduce the problem in their lab.
Now I developed the habit of manually plugging in the fan when the power went out and then removing the plug when the power came back on. Imagine doing that at 3 a.m. in the night!.
Finally I had it with Systek, after hearing some good opinions regarding Aurora, I bought it from Metro (the pure sine wave model). It was more expensive than local and even other Chinese brand name UPS, but it has proved to be very reliable. Output is close to sine wave and thus it is better for motor driven loads, fans don't whine, and it does not kill fan dimmers. I bought another Aurora UPS recently (1.4KVA) and I moved the older unit to the upper floor in my house.
I still have the Systek I did not get it fixed, after the warranty expired. NEVER EVER BUY SYSTEK.
I've heard some good things about Saltec. Homage is a mixed bag, some people say it is good, other people complain. However a couple of my colleagues are using Homage and they are quite satisfied with it.
As far as value for money is concerned I think Homage is best however if you are willing to spend some extra and get a "pure" sine wave UPS then Aurora is a solid choice.