Howling Griffons army. Well, the overwhelming winner, with 73% of the votes cast, was the original Rogue Trader "Mr. Peanut" style walker.
This suits me, so off I went to eBay to find some suitable models... and ended up with three. I only got two left arms in the deal though, but that's OK since I was planning on updating the weapons loadouts anyway. I'd gotten some rare earth magnets at Lee Valley Tools suitable for the purpose, so on those went...so when I run I'll have a choice of two lascannons, a missile launcher, a multi-melta, or another CCW.
Next up is another vehicle for the Griffons. Since I got the Razorback turret for one of the Rhinos I figured I'd be unlikely to use the Predator turret, especially if there were no opportunity to mount sponsons. Then I happened across a set of Rhino track pieces on the sprue, with no chassis... so I figured that even with my minimal scratch-building skills I could cut up some plasticard to make the chassis. The bitz box supplied the requisite parts to finish the model - front doors, sponsons, hedge cutter, etc.