I am at home waiting for the installers to come to install the Toshiba System 4 Inverter today.
Getting this system 4 purely on consideration that mostly to on for 2 BRs at night and day for hall. Therefore, the consumption might be high too, and getting a system 4 does make sense.
Other considerations:
- The phasing out of R22 by year 2015 and maintenance will be higher
- system 4 able to add more value to your house when selling, as R22 has phased out
Just my 2 cents worth. Also, based on your budget.