product recommendation - Siddur with metegs? (and preferably markings for dagesh chazak, kamatz katan, shva na, chirik gadol)

I'm interested in a siddur with good markings..

1st priority is it should have metegs..
2nd priority is it should have kamatz katon marked.

and preferably also, markings for dagesh chazak, shva na, chirik gadol.

At the moment the best I have is a sacks singers, at least it marks out the kamatz katan, but it doesn't have metegs (and I have on good authority that it mixed up traditions regarding the shva, an example being in the shema). But even one that mixes up traditions is better than nothing.

So for Kiddush (veshamuhru vnai yisrael et hashabbat) i'd like the siddur to show that there is a meteg on the shin.

Answer

All of the people here who have answered don't realize that Ashkenazi siddurim (and tikkunim) in general lack many metegs. I've also noticed that Ashkenazim in general don't even realize their siddurs and tikkuns lack metegs.

This would explain why there are a few answers here who state that the Koren Siddur has the correct metegs, even though it doesn't. I would point out just one of many examples in which Koren siddur lacks an important meteg. The Koren siddur lacks a meteg under the ַה in הַלְלוּיָה that is present in not only many Sephardic and Yemenite siddurim but also the Aleppo Codex. I've attached a picture comparing a page from a Koren Ashkenazi Siddur and a page from my favorite Sephardic Siddur, the Livorno.

As you can see, the Sephardic siddur not only has more metegs but also te'amim for Psalms to give you more precision since there are many Sephardic Jews who know how to chant Psalms with the te'amim. I chose this particular lack of meteg example to highlight that the lack of metegs causes Ashkenazi Jews to incorrectly say HalleLUyah instead of HAlleluYAH as the author of Psalms intended. Oddly enough this same Ashkenazi mispronunciation is also common amongst Christians.

This same Livorno siddur has a meteg under the shin for Kiddush that you requested as well.

If you are wanting a siddur with metegs because you want more pronunciation accuracy then I suggest that you switch to a Sephardic or Yemenite Siddur and abandon Ashkenazi siddurim and tikkunim. In general Sepharadi siddurim will have more metegs than Ashkenazi siddurim, and will often have the te'amim for the most amount of accuracy possible. Yemenite siddurim lack te'amim in general (even for Shema'), but have metegs in equal measure as their Sephardic counterparts.

For a clear and easy to read Sephardic siddur I recommend a reprinting of the Livorno Siddur. For a clear and easy to read Yemenite siddur I recommend the Siah Yerushalayim.