But there are some of us here that think both are kickass in their own way.
Shinkenger. Psychic Lover. Just makes you want to slash Gedoushu and break vases in a hot-blooded and exciting sort of way.
Journey Through the Decade -- While I'm not a super-fan of Gackt (I likey TM Revolution better), I think this is one of his better songs, with Redemption at a sticky close second.
With that being said, since I can only pick one....I choose Journey Through the Decade. It just sounds so much more epic.