Renovating my new house, now sourcing to buy 3 units of Air con. Initially, thinking to go for Panasonic invertor but after search through some forum Panasonic also caused quite a lot problem.

After did some searches, the Daikin/York sounds more reliable furthermore, my office installed 3 units of DAikin intertor. So far no problem, quite quiet, strong and cold.

MY apartment is ~800+ square ft. During weekday, usually turnon air con >8hrs for both bedroom + 1 air con ~3hrs for living room. Whereas during weekend, living room easil > 8hrs. So, should i go for invertor or no need ar? FYI, I have searched from internet for this topic, but still can't decided yet. So, please advise:
1) Whether should go for invertor or no need.
2) Plz recommend where to buy these, cuz i can't find these brand in SEC/SenQ. And also a reliable installation guy.
Thank you,