I like the bold font and the slight gradient in Entry #2. I also like how it's easily reversible. Good incorporation of the spider motif in the "X." I'm currently up in the air as to whether or not I want one of the letters to be turned into a symbol, since the company name itself if so esoteric. That said, you did an excellent job of it here.
Wow, #23 is excellent! I really enjoy the spider/snake combo in the logo. I think making the symbol its own element was definitely the way to go; I like how simple and bold the text is.
I'd be interested to see the symbol on the left of the text.