Can your rifle take an arca rail or picatinny rail section in front of the mag well?
If so, you will be lightyears ahead using the RRS Anvil ball head over the ones you mentioned. I had the pig and the night stalker... the clamp saddle attachments to the tripod are nowhere near as secure as ARCA/picatinny
the RRS Anvil can clamp onto picatinny no problem
if you got to shoot the saddle vs arca/pic side by side you would NOT buy the clamp versions.