There are times during the year where I travel which requires the power of the MBP. Unfortunately it is quite difficult with a Mac Pro and monitor (which I have tried) and the MBA just doesn't cut it. I still have my Mac Pro though for the serious work, just haven't had the time to set it all up yet as I just moved.Why not trade the 15" for a Mac Pro then? It seems better suited for the purpose. You could always use the Air around the house if you wanted to be portable.