But the show if it came in the US would not targeted towards the fans, only a little bit. Most kids haven't heard of the series and if they did probably either know the Japanese original from being in Japan from their parents being in the military ,live on the Western coast or have seen Dragon Knight.
You could do anything with the franchise at this point ,even dubbing it sounds attractive over not having it here altogether. But even I want an American twist to the series ,maybe even recreate the original through a modern series. There had to be some reason why it and V3 were so well received by Hawaiians and Japanese alike.
For that concept I'd use Faiz or perhaps create an American update to the series with all new footage using the First suits minus the shocker ones which can be CG'd.
But if you are talking cost, I'd use Faiz and Double or even Kuuga/Agito. Kuuga would need some reworking but in general the series would be a prime candidate for adaptation.