Thank you. I've been searching and reading on this site about technical info, just to be an informed consumer. As I understand it, the two-stage compressor is helpful with humidity control and cooling. We don't use the AC all that much in the summer, and compared to other climates I've lived, humidity is not bad. I'm thinking that the 2-stage is probably not worth the difference in investment.
And, to all who have replied - your comments have been very helpful - much appreciated!