Folks, the thread by Xringer has at last tipped me over the edge to go ahead and try my own DIY install of our mini-split system.
I will skip the contractor part as the prices quoted to me were close to double of my equipment + parts costs combined.
The outdoor model which we bought is a LG LMU245HV
The indoor models for our evaporator are LMAN095HV X 2 (for our 2 bedrooms) and LMAN125HV X 1 (for our living room)
In our rated configuration, these units will have the following efficiency numbers
* Cooling
o EER = 12.5
o SEER = 18.7
* Heating
o COP = 2.6
o HSPF = 9.6