Oh, and go into a store and try and find an Arca-compatible plate.
Try and go into a store and buy a Gitzo tripod or a Canon L lens... not many. But stores that DO sell L lens and other pro gear WILL carry Arca plates... just saying.
I would never settle with RC2 plates after using Really Right Stuff and Kirk plates.
Markins with Arca-Swiss clamp is a great setup. You will regret buying RC2 and end up spending more down the road to upgrade.