Some good advice has been offered, I would submit another option probably worth your time to consider (cost and usefulness) would be a variable neutral density screw-in filter. I have personally used it with great success, yet it too has its limits and faults, ie., the dreaded 'x' at the higher stop range and occasional color cast. The benefit, to me, is the ability to focus at the lowest stop then adjust to the desired shutter speed. It can be stacked with a CPL as well. Step-up and step-down rings are very inexpensive; I own a 77mm VND filter and have easily adapted to my larger and smaller thread size lenses. YouTube has some great information to help you decide if this system works for your particular needs. Again, not a perfect option but works for me! Good luck with your LE photography :)
The attached pic was taken of a VERY rapidly moving Merced River with a VND filter, and while it smoothed out the water, due to the water flow, couldn't capture a 'mirror' reflection.
I really like my Sony 70-300 G series, and also have the 24-105 - taking both out I have 24 to 300 covered (actually out to 450* see below). The 'Optical SteadyShot image stabilization' works well shooting static handheld and panning. It is a bit heavy, so sometimes I will pack a lightweight monopod. I feel the weight is worth it as the IQ is very good, and when shooting in APC-S it equivalent to 105-450 - almost like having another lens.
6 shot panoramic using tips and techniques posted by UHH members on various forums.
Nearing sunset, tried to time captures between gusts of wind!
I found Microsoft ICE did a better, cleaner stitch than PS 6.
Thank you UHH members for sharing your knowledge and experience!
Sony A7iii ---> 24-105mm. Decent wide angle with the capacity to zoom.