This was my first season with my NEO. I have a 7X22 with a spring axle. Biggest group of sleds I hauled was a 144, 141, and 129 and they all fit without fine without even thinking about what order to load, or doing anything other than just driving them in. If your just looking for room for a third sled I wouldn't go to the 26 unless you plan to haul 4 sleds some of the time and don't mind pulling that size trailer all the time even when you don't need it. I have plenty of other room for gear too, we use plastic bins and easily had 6 bins in there plus tool boxes, oil, and other stuff. Never thought about the spring axle at all, so can't really say it was good or bad since I didn't have anything to compare to, but it pulls great, rides smooth and never gave me any reason for concern. I thought the price difference was about $225 per axle so that's only $450 if you really want it, but I could be wrong as I never really considered it.