Robert:
I worked at a dealer who carried the Excalibur line as an entry level option.
We had a very high failure rate with the units, but it made it easy to sell up to a more reliable brand. This has been 3 or more years ago so maybe they've improved. Usually they failed right out of the box.
Since you're in Hawaii it would pay to invest a little more up front & save the $$ & frustration you may have to expend shipping the units back & forth to the mainland.