Daikin's pretty good. i've been using it for close to 15 years LOL...but if you want to save on electricity bills, buy Mitsubishi; Jack Neo swears by it :bsmilie:
Sanyo +1. they specialise in keeping their compressors running for at least 20 years. Tech's taken from their biomedical range. think -152C deep freezers still running after 20 years. :bsmilie:
Get an inverter if most or all the units are turn on together regularly. It work most efficiently as such. Depending on your usage you may want to choose an inverter or a non- inverter. Check and compare the Energy Label. Do a bit of homework and see which one give you the best energy saving according to your needs. Check your existing ducting if it require any changing as well.