We were originally looking at getting the split systems, best thing you can do is get a good company out to have a look at the layout of your house and see what will suit best. 3 large systems that would cool most but not all of our house installed was going to be around $8000 and the refridgerated was $10 so we felt for the extra 2k that it would be better to have the whole house cool when we want it. I slept with a doona for most of summer last year!