I totally agree with @macg19 : your choice of phono stage should be led by the cart you’re using. That being said, I’ve heard great things about Schitt (in fact, the folks at Raven Audio often recommend them).
FWIW, I used the onboard phono stage in my Technics 1500 SL turntable for the first year of my current setup (with a Nagaoka MP-200 cart) and my Raven Audio Osprey made that system sing! It sounded fantastic. When I upgraded my cart to the Nagaoka MP-500, I wanted a better phono stage (tube based with more gain as the mp-500 has a lower output than the mp-200), so I upgraded to a Quicksilver phono pre amp. Does it sound better? Absolutely. Is it a night and day difference? No. The mp-500 extracts more detail from the grooves and has better channel separation. The QS phono pre creates a thicker sound and much wider/more defined sound stage. But my system sounded great before upgrading.
So, if I were you, I would go with the Raven and Schitt combo for now. Set a baseline/reference point of your system’s sound signature. You’ll get TONS of listening pleasure without breaking the bank and you’ll get to know what you’re looking for in your next upgrade (if you even need one at all). That will give you time to research and save for your next move. Most importantly, if you do finally upgrade either the cart or phono stage or both, you’ll be able to fully EXPERIENCE THE UPGRADE! Skipping straight to "the best" robs you of the journey of hearing your system get better and closer to your optimal sound over time. Just my two cents.
Good luck!
P.S. when we say, "the phono stage needs to match the cart," what we mean is there are several technical considerations that need to be right for your vinyl to sound good: MM vs MC carts are two different paradigms (they require very different gains and you have options for how to achieve the required gain), MM carts are sensitive to capacitance, different carts require different loading (i.e. impedance settings) that your phono pre will have to accommodate, certain carts sound better with a tube-based phono pre, while others prefer SS, etc, etc...