Personally, I still find the whole idea of the plenum window stupid and "ricey," if I dare say... although personal preference, like most. Unique? Sure. Not really? Will I laugh at you at the next CnC if your hood is up? Absolutely.
And this is coming from a guy who ran a full Voltex kit on his Evo 9 and a couple of mismatched brands of aero on his S2000 (C-West rear bumper, INGS front bumper, JS sideskirts, Voltex flares, Voltex Type 2 rear wing), and my current M3. I literally define "rice" to most car guys.
Although if the non-window version shows up better, it could be something to consider.
And I am considering, but I'd like to see a few on the market first, as I don't want to be the R&D guy... when I already do that for work, and I don't want to work after work.