Hey i saw those too on Scibor's Monstrous Minis :) They look great! Daniel's doing the Spartan Army, i reckon they would look fantastic on his Marines ;)
"TONIGHT WE DINE IN HELL"
ROFL! Besides SM, who else would make good Spartans? They need to be able to withstand a lot of punishment, elite enough to mette out tons of punishment. I can think of Chaos Terminators but using normal SM minis + these heads and shields.