I want a GREX 4000d too. Mediators dont have a video slot and if you already have a picassoIV then it is a total waste.
They were IMHO mad not to include a video slot on the Mediator A4000d.
Granted, it ain't perfect but it beats Zorro eight ways to Sunday.
It only beats Zorro on price and then it depends what you already own.
If you own no Zorro cards, then absolutely. A mediator + graphics card + sound card + network card is MUCH cheaper than zorro equivalents.
Own just one zorro card (gfx, network, sound card) then it is not as good a deal.
Own two (like me, Picasso IV and XSURF) and it just isnt worth doing at all.