High velocity air conditioning-good idea or bad?

I am looking at a house that has the good old radiators for heat and the current owners use room air conditioners in each bedroom. Someone told me a solution to this would be to install high velocity air conditioning as it does not require massive installation of duct work. I am wondering how efficient it is and... show more I am looking at a house that has the good old radiators for heat and the current owners use room air conditioners in each bedroom. Someone told me a solution to this would be to install high velocity air conditioning as it does not require massive installation of duct work. I am wondering how efficient it is and how expensive it is. I would be cooling an area that is about 1000 square feet--basically a living room, kitchen and 3 bedrooms. Also, how energy efficient are those old radiators. I have heard that they are very good at keeping the house warm--but are they expensive, can you put timers on them like you do with forced air heat, are they energy hogs?
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