Quick rundown on COP Complete as requested:
1. FOR DX-10/11 render options make sure you go into advanced options as set SUN to high and all your DX-10/11 stuff to high or the game will crash when you try to start playing.
2.
Good: "Complete Pack" works as advertised; not going to repeat their bullet points for them.
Bad: Still has bad multi-core support so 1-2 second pauses on large maps are still common. They are pauses though, so the action won't keep going while you're lagged.