I go one way or the other like Sharks, too. I haven't had any luck mixing them because the hermits kill the snails.
In the 125 sps I keep a large assortment of snails- nassarious, stomatella, turbos, astreas and cerith. The only crabs are acro crabs and my anemone crabs.
In my 125 prop I keep blue red and zebra leg hermits, and an emerald. I keep quite a few emptey shells in there for them.
I think the snails do a better job than the hermits, but that might just be because my prop system is relatively young and also system differences. I'm seeing a little hair algae crop up in there lately
Seeya! -Becca

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240 gallon glass mixed reef 2x 250 watt m.h., 2x 175 watt m.h., 3x 110 watt vho's.
55 gallon propagation tank, 2x 96 watt pc's
Empty 125 gallon tank
reefer girrrl!