Luc,
I understand your decision. And, I hope all goes well with your project.
I will say that after what happened during the introduction of V4 FX, that Xilinx has placed many "gates" and "systems" to prevent a re-occurrence of that terrible time.
To that end, the release of Virtex 5, and the GTP's, has been a real pleasure (for us, and our customers).
Austin