I've not tried a MOE stock on the M&P-10, but I found the M4 style stock to be painful with the recoil of the 308
I replaced the M4 stock with a CTR
Much more comfortable, but I didn't like the cheekweld with the scope. I replaced that with a MagPul Fixed Carbine stock
Haven't shot it with the Fixed Carbine stock yet and plan to add a thicker recoil pad.
The MOE stock should be a better choice for the big Smith than the M4 stock, especially when you add the thick recoil pad. Handguards are a matter of personal preference. I like the MOE handguards better than the round style. If the MOE version gets you what you want more economically than buying everything separately, then it's a no brainer