I'd say go with the Fusions. Even if what they claim "team driver packs" isn't true then you're still better of then buying a powercube. The powercube cells are only zapped, not matched. On the otherhand, the powercube is a lot cheaper.
You're choice, go for matched, slightly more expensive packs or go for the unmatched cheaper option wich you'll probebly regret.
Regards