First off, good list. You aren't going to go wrong with any of these.
I just got an Ibanez 405EQM and I love it. The balance is perfect despite being super light. The neck is super fast and comfortable. The B string has great punch and clarity and doesn't feel loose.
I played a Schector Elite-5 for a few months that I borrowed from a friend. It was a predecessor to the Stiletto Studio-5. You consistently see the Stiletto Studio-5 as one of the best in numerous reviews. However, I will say I prefer the sound and playability of the of the Ibanez over the Elite-5 (and that bass has a solid neck-thru-body). I thought the B string was a bit muddy on the Schector. That being said, I love my Schector Studio-4 and think it may be one of the best 4 strings I have ever played or owned.
I went with the 405EQM because of the single/humbucker/power tap option. This bass has a great tonal range. I only have one 5-string, so it had to check all the boxes. I primarily have played 4 string. But there are some really fun songs you can only play on a 5, so I can't live without my Ibby now! (He get's center stage because of the finish.) View attachment 4203739
I only have one bass right now and it's an Ibanez SR250. I've had a lot of problems with it so 405EQM has been lower on my list. How is the QA on yours?