Multi split heat pump

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ispookie666 said:

Fascinating time in the field of heating as we are nearing the cross-over point for ASHP, including alternate fuel for conventional boilers.  

There are advantages and disadvantages to ASHP (A2A) 

Advantages 

• Cheaper to install than Air 2 Water 
• Quick heating 
• Highly controllable 
• Quiet 
• Cheap to run compared to any other form of heating, COP (it goes by various names for the season) is highly dependent on the outside temperature and humidity!  

Disadvantages 

• Noise - the outdoor unit, if it's 3dB more than the ambient, you will run into problems if you are in a quiet neighbourhood. This will be an issue for multi-split and worse in colder months.
• The rooms will have to be on the same mode or off; this can be a problem in shoulder months (especially if the rooms are North and south facing)
• Planning permission - You need planning permission for any system which can cool. Unfortunately, that is the law/rules, and there are no permitted development rights for the Air 2 Air system, all of which have cooling mode.
• Ducting - can be unsightly. 
• Low-frequency vibrations - if the units are fixed to the outside wall.
• For larger units, you will need dedicated circuits.

Also, the ability of the unit to track the set temperature depends on the units - I have found Daikins to be useless compared to Mitsubishi.    

I am considering A2A, floor mounted in my lounge drill thru to heat pump outside, so not multi. Can you recommend which Mitsubishi is good atm?