I've been considering making a Rhino or Chimera walker for a while now, and the one in your pic got me going on the theme again.
Hmmm.. not to sure about the tracked legs though.
The speeders are great looking, and as far as I can tell fairly simple conversions. I wonder if it's not GreyDeath's (on WIP) army. I could be wrong though...
Once again though, thanks for a load of lovely pics. Don't know what I'd do without you