Yea I've looked into the usual air cooled equipment, but unless you have a good sized buffer/storage tank your still going to have the temperature swings because your still banging compressors on and off...back to square one. Also, even in "quiet mode" they are still very noisy for a residential area. To answer your question, the absorption chiller is appealing in theory but it is way too expensive upfront. I have contacted that company and for what I could have two 3 ton systems changed out, I could buy the GAHP-AR machine! Mind you, it is very efficient but when do you see your ROI? 10 years? 15 years? Plus, who do you know that can work on an absorption chiller? (not me!)
What I would like to do is make ice with something like this. Only problem is they don't sell to the general public, only to utility companies! I believe with that equipment you could vary your CFM in your AHU without having to worry about freezing your coil and maintain setpoint.