You might wanna look at RGS in the 500 & above series from about 87 to 99. They're Fujigen build & the edge trems are super.
I just picked up a 1998 Fujigen S540 last week with the Lo-Pro Edge. Was looking around for a second similar guitar for a gig I just got, so this isn't a must-have by any stretch. That said, this one is also a Fujigen built, whatever that means these days, and it's local.
I've never owned an Ibanez before, so I know nothing about the different eras and associated build quality.