I used Tamiya Japanese Army Green right out of the bottle, pre-shaded with black, and I liked the result. Others have used Humbrol's Bronze Green.
BTW, how did your build go? Some of found out quite by accident that we were all building that very same kit, and exchanged a bunch of tips on how to best deal with the troubles we were having. If you want, I can post links to at least some of those threads.