After the collectives advice. Decided I need a new project for next year, and so dug out the old Starship Troopers rules from Mongoose. Have always really liked them, and as I now game Sci-Fi in 15/18mm and currently have no models - was wandering about that.
CAP troopers seem quite easy - CMG Arc Fleet fit the bill nicely, though Marauder Suits and other special equipment might be more of a challenge.
The main issue will be the Bugs. Not sure what's out there, though Khurasan have a possible option, even if I'm not keen (the Earthdawn suits will make good Grizzly/Cougars I should think). So, any ideas or pointers.
And I will eventually look at Skinnier.
Another reason for 15/18mm is the silly prices the 28mm stuff goes for. Am aware that Rebel has some of the old Mongoose ranges, but want to focus on the smaller models if able.