happy to help. it's one of those things that's incredibly basic and doesn't have a lot of moving parts but is difficult to describe and then there's the confusion due to the pieces involved all kinda having the same name.
anyway, as you can see there's a bunch of options out there, it's just down to what style and look you want and how much you want to spend.
i will say this, the more expensive stuff is definitely built/machined a little better and tends to be marginally better in fit and finish department which helps in the leak/weeping of oil; but know this going in that almost all of them will weep a little oil no matter how good the parts or install is.
