No matter how good or bad a name might be, I never like changing just because then people get confused and don't realize you're the same member. Every time I see a changed name, it takes me a while to realize they are an older member.
But to answer your question, I think the first name on the list is the best.
Why thank you Blackhearts, it doesn't really fit my taste anymore though. Kinection will be my perm name, AquaticStory got too boring to look at every... SINGLE... DAY. That's prob how you guys feel too. lol