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I am a very happy long time user of the Really Right Stuff Lever Quick Release clamps, and use them with the RRS L brackets. If you think you may want to go that way some day, you might want to consider getting a RRS L bracket right now, so that it would always work perfectly with their lever clamps. You could also consider putting one of the two sizes of RRS lever clamps on a Markins ball head, either right now or in the future. And the RRS lever release system is far and away better than which ever of the Manfrotto lever release systems you had, with fast simple secure operation that becomes second nature.
I prefer and use RRS ball heads, but there are a lot of other brands that work well too. As I understand it, the clamp on a Markins head is normally put on with Loctite, and can be difficult to remove for future changes. But you may be able to order it without Loctite, or without a clamp at all if you want to put a RRS lever clamp on right away.
The RRS ball heads and their clamps have an interlocking tab and slot system, which allows easy changing of clamps with no need at all for Loctite, so that is another feature of their ball heads and system that is not allways appreciated for someone doing comparison shopping. In seconds I can change my clamp from a screw clamp to a lever release clamp or even a panoramic clamp, and never have any fear that the clamp will rotate or come loose on the stem of the ball.