Chris-
No offense, but that site is a bunch of crap.
Not exactly "in-depth" if you know what I mean.
The comparisons were a paragraph long, with no testing at all.
It's interesting that they are comparing a rack mount to synths with actual keys attached.
As for the COSM effects, I have heard them extensively. I am in a joint production with a guitar player. I have frequently sat in with him and other guitarists.
The COSM effects are not that good. Roland has a real knack for hyping the heck out of everything.
As for the 128 polyphony, lets not forget that the good Roland sounds require 4 parts, which effectively and MASSIVELY reduces your polyphony. Everyone always complains about "timing problems" on roland synths, when in fact they are running out of notes.
This is a common problem with the xp and jv synths.
The Triton doesn't work that way, and neither does the Kurzweil. The polyphony is basically TRUE polyphony. Roalnd really has to stack those sounds, thus creating huge polyphony defficiencies.
Lastly, the 5080 isn't anything new, at all.