This one looks interesting enough for a few reasons. It is an enclosed unit designed for medical use, which makes me believe that it will be built very well due to the strict standards required by Hospitals and other medical establihsments for running sensitive life support systems. It has a max current of 53amps, but they do have higer rated amps as well. But for the price range of around $400 this was the best one that I have seen so far. It has an input voltage of 85 to 264volts, which was one of my considerations due to the fact that we keep moving back and forth from countries that have 120volts, and 240volts AC for public power supply systems. It might just be another one to consider. Still looking.
http://www.trcelectronics.com/Cosel/pba600f-12.shtml
This one is rated up to 88amps/1000watts, but the price is nearly doubled at just over $700.
http://www.trcelectronics.com/Cosel/pba1000f-12.shtml
This one is also rated upwards of 80amps, but sells for around $450. But it is strictly 120volt input.
http://www.12volt-travel.com/80-amp-...ly-p-4821.html
Not sure what the price is on this one, but it has a 720watt output and variable input.
http://www.acopian.com/single-s-low-m.html
There are a few in this store that look like they would be able to handle the load, and the prices are much better.
http://www.wearecb.com/store/12-volt...y-c-31_77.html