I have the 240 Apo-Sironar-S. I bought it after testing the 240 Apo-Sironar-N. Optically the N is a fine lens, but what I learned from trying it is that when I'm using a wide lens on a squarish format like 8x10, I really do need that extra room for movement, especially front rise.
I have the 240 Germinar-W as well, but I use it as a compact normal for whole plate.
Yes, the the 240 S is a big and heavy lens. But if 240 is going to be your workhorse, you just need to decide what will be more frustrating for you, lugging the extra bulk and weight, or - depending on your shooting style - continually running out of coverage. That will tell you which way to go.