I've owned and edb 400 and the edb 600. The edb 600 obviously was/is a way better bass in general. The 400 is cheaper built and less tonal options but still a decent bass. With that said the Ergodyne series was such an awesome series made by Ibanez back in the early 2000's. I remember all of them being pretty expensive. Now you can pick them up for dirt cheap, which is cool cause you're getting a quality instrument that has more value then what they are being sold for right now for cheap. These Ergodynes will compete with your $1000$ plus instruments. I see people talkin negative about the luthite bodies not being made of wood in a few different threads on TB.
Personally I tend to be somewhat more traditional and I'm not one to venture away from a wooden made bass/guitar but on the other hand I don't really take notice to the luthite material. I just bought a charcoal grey edb 600. This will be the 2nd time I've owned this model bass and I'm looking forward to it considering I'm 10x the bassist I was when I last owned one. I've been playing Fender for some time now, and recently I've had a desire for a bass with a more comfortable neck. I've owned my fair share of Ibanez's also throughout the years and when I picked an sr1500 up and played it at GC I had forgotten how fast and comfortable Ibanez necks were. I recently put down the pick and went back to finger playing do to the style of bass playing I have been playing.
I been playing a lot more melodic, scaling, walking basslines consisting of speed at times and it's just to much for a pick. With that said, at times my fender p and even jazz basses seem to be slowing me down some as they feel like a chore to play while playing these type of basslines. I'm always looking to evolve and be better in every way as a musician with both bass and guitar. Always looking to play better, use more/new/different techniques, searching for that perfect tone and looking for that 1 instrument that to me is better then them all. I have different bass/guitars for different tones,techniques, phases and whatever else.