pirate cycles

SHORT YOUTUBE VIDEO! last night, first photo of me on the bike! Long time since i've been on here guys! got a heavy-photo post for you to get you all caught up. so this is my second build, which went through a few changes along the way as you'll see. -finally running the pirate cycles...

I would like to consider upgrading my head on my Grubee GT-5 and was wondering if anyone has tried either of these heads and what their experience has been? I'm looking for a little extra power and speed, and wondering if it would be worth it over the regular china slant head on the Grubee...