I do not know much of the Solar, you are welcome to share your thoughts on here and make a new post!Actually, that was my second question. I’ve been considering the Yamaha TRBX 505/605, some Ibanez models, and the Solar AB2.5. I like the Solar the most, but it’s more expensive, and I’ve heard the quality of the 2.x series isn’t that great. Also, the AB1.5 only comes in black, which is a big downside for me.
Yamaha 500 and 600 are great basses, I personally like the TRB1005J/4 series but they aren't sold new anymore in the US, but you can still find them! TRBX is the successor and just as good and thin necks! Ibanez is great! I would try them all if you could!