Wow Danny, I love
The Zero Room. It's brilliant.
I have less love for
The Lost Dimension although I can't quite put my finger on what it is about it....
I like your Glynn recreation, the other two seem....strange. Especially the section before the bridge in your Howell recreation. Were you at Blackpool or something? Seaside organs FTL.
For me, the original Howell theme is the best. There's enough "thump" in the background to almost give it a percussive side. I like my thumps.
EDIT: I just found my first ever attempt at it. Timing's a bit dodgy. :S