The problem with the Dark Horse ones is that they are too big for 15mm, but too small for 28mm.
I don't know of any 20mm Ninjas and figure I'd be able to find most other figures (ninja, mutants etc...) in 28mm more than any other scale.
Ninja wise I'm using some Eureka stuff and I'd like to get some perry stuff too.
Someone gave me the heads up on a possible Splinter figure - just search for DEAL-0672 Ratman Mage 25mm miniatures on ebay and you'll see what I'm going with for the moment.
I want to cover the initial comics to start with and then expand to the rest of the TMNT universe.
For Utroms I'm going to use EM4 skeletal robots and Copplestone Castings robots
Not sure what to use for Mousers yet... I have some Dark Horse ones that might be ok - but nowhere near enough...
Rules wise I'm statted them up for SBH, but am looking at SuperSystem as a more detailed skirmish with less figures.
I've also got a rather large TMNT Heroscape project underway at:
http://www.heroscapers.com/community/showthread.php?t=28924What rules were you thinking of? Any other figure ideas?
Cheers,
Ben.