I think Sindel's is great too. Sure, Stryker's is more unique but hers is brutal as hell and very cringe worthy. And that's what every X-Ray is supposed to be first and foremost.
Something does make me wonder though: Will Stryker's X-Ray work on Kenshi? He can't see, so the first part where he shines the flashlight in the opponent's face won't work. Which would actually leave Stryker open for a free hit now that I think about it...
It'll absolutely work, the question is simply whether or not they will change the animation for him, I'd imagine. I kinda doubt it, as changing the frame on the move against a single character would screw over competitive Stryker players a bit, but we'll see.
I like Stryker's better, but the thought of getting your knee broke that way makes me cringe. Is Sindel the only one with a knee break like that?