The 4g63 has been around for a while, and it has seen all the fame and respect it's going to get. The VQ has been proven to react like a blind old man to upgrades, even full turbo kits make relatively low power in them.
The LS7 is going to amaze us in the upcoming years. I can't wait.
Hopefully the new GT-R motor won't be a VQ, since it is meant to stick out from the rest of the lineup. I expect something magnificent to come from Nissan.