Thats right, a lot of people talk about setting up two networks, but setting them all up as one is fine also.
I seriously thinking about pixelnet only ... since from the SS HUB, I'm able to do DMX also. And each SS HUB you have basically gives you the option to have another 512 channels of pixelnet converted into DMX on the DMXOUT, if you so choose.
The trick for using LOR controllers in DMX mode ... is having the correct cable, which swaps wires 4,5 (LOR dmx) into wires 1,2 (traditional DMX). If you put the LOR controllers last in the signal chain (say after your last LE or DMX device), you only have to swap these once, then daisy chain your LOR controllers as normal.