I tested both the KSUB and the KW181. KSUBs are okay, but IMO, you'd need two. I paid a little more and went with the KW181. Not saying I couldn't use two of those as well, but one KSUB vs. one KW, no comparison. KW181 has casters, easy to move, and 88 lbs, doesn't feel like it when I'm loading it. Well worth it. Again, the 6 year warranty is the icing on the cake.