As I continue to slide around on this slippery slope of buying Festool tools, I'm now deliberating over their Rotax sanders. At first glance it looks as if the primary difference between the 125 and 150 is the pad size. I haven't actually fondled either, so I don't know about physical size. The specs say the 150 is about a pound heavier..... I'm inclined to go with the 125, because I have several boxes of 5" sand paper for my collection of 5" ROSs. If I do buy one of these sanders, I figured I'd ask this crowd for input first...... If I get the 125, will I regret not getting the 150? Is there a not so obvious attribute the 150 has over the smaller sander?