I ran acrossed this on another website, i thought it might prove useful to someone trying to decide on a brand to go with. They are rated 1 to 5, with 5 being the best rating. This of course is just one contractors opinion, if anyone disagrees, please voice you opinion.

http://www.hvac-for-beginners.com/geothermal-ratings.html

(NOTE: The original content has been deleted and a link has been inserted at the request of the owner of the content.  GBT Mod)

I'll take a stab in the dark and gas this "one contractor" is a water furnace dealer. Climatemaster makes the Carrier, Bryant, Century and Comfortaire so if we're judging system performance vs. dealer service there is nothing scientific about this report.
Joe

Please substitute the word guess for gas in my last entry
J

my guess is that he owns WaterFurnace Stock :) either way it is a gas :):)

Note the somewhat positive words on HydroTemp, then a bottom rating!? I'll look elsewhere for comparisons.

Well I haven't even heard of half the models listed, but yes I also found it strange that Comfort aire rating was lower then Climatemaster since they make them for Comfort aire anyway.