Toro designed a relatively small (1/3 ac.) system for me and reccomended that I use their Simpleset rotors. These are in the Toro residential line of products. I would rather use something of higher quality considerng their is not much of a price difference. I see that this forum highly reccomemends Hunter products. Would the PGP rotors work as a replacement? What about valves? The Hunter PGVs?