I want to thank everyone that responded, sorry it took so long to reply. JakeKohl, your advice was right, I was considering the Mitsibushi 14000 as a compromise with my usual A/C repairman. He wanted 18000 or more, & became more of an argument than I needed. I ended up with a Mitsubishi 12000, more than enough for my space. Unfortunately I used the best company I could find. Good sales, reasonable price, Larry, Moe, & Curley for techs. I've straightened out most of the things they did wrong, but would have done a better job on my own. Unfortunately I couldn't find anyone to simply do the pressure test, vacuum, & start up at a reasonable price so I simply payed for the install to get the warranty. Both the indoor & outdoor units are scary quiet & keep the shop cool & dry with little effort.