Just asking...because I did the pay-back #'s when considering which direction I was going to go....I have gas....if I were to go with a gas unit....the payback would not start until about the time the unit was at the end of it's life.
If you have electric....then they are worth it.
Sorry I can't recomend a brand....hopefully some of the others will chime in.
BTW....when I was doing my research....I looked at available models...and then did a search on that model....you quickly find out which ones are not worth getting by the number of hits on that model as people ask troubleshooting questions.
Even if you are on the right track, you will still get run over if you just sit there.