I played a 1500 point game against my friends grey knights, using what he calls a "highly experimental" list. In other words it was very silly.
GM with orbital bombardment ability
2x5 GKs each with a psycannon, all with psybolts
1 dread knight, sword
1 dread knight with the gatling gun
3x vindicares
He lasted 6 turns to be fair to him, but he had run out of models at the end. We ended up with objectives, 4 of them. With him only having two troops choices, my objective was to kill one of his, then take the three other objectives to win. By the end of turn 6, he had no models left at all, I had lost 2 rhinos, a single obliterator and 3 wounds off my daemon prince. Everyone else was still alive!
My list was:
Daemon prince, MON, Wings, warptime
10 chaos marines, champ w/pfist, 2x melta in rhino
10 chaos marines, champ w/pwep, plasmagun, lascannon in rhino
9 T.sons, sorceror w/doombolt in rhino
5 Plague marines, 2x plasmagun in rhino
1 obliterator
1 obliterator
3 terminators, 2x combi melta, chainfist.