Recommendation for ARCA tripod head


Was looking at this cheapo
 

Was looking at this cheapo

Really depends on what your doing, and how stable you want it to be. Personally I would not trust my fairly expensive rifle on a $20 ball head (nor my expensive cameras).

You don't need an RRS head but I would spend a little more then $20.
 
What about recommendation for just a an ARCA plate. I could just install a plate onto my existing shoe on one of the 2 normal heads I already have for my tripod.