I know several guys online who are using or will use 15mm. It is scale agnostic and based on Ivan's Squad Hammer rules. Most will probably choose to use individually based figures, but as usual, I went my own way with a section being two 40mm x 20mm bases with 3-4 figures each. That way I have the minimal number of "things" to move around the table, speeding things up, but there is some articulation to the squad for aesthetics.