Today I played a 2000 point game against an Ork list with lots of boyz, dreadz and kanz. It lasted a good few hours and was played on a smaller 4'x4' board.
I used the following army list:
HQ
Bjorn the Fell-Handed
Venerable Dreadnought; Plasma Cannon
Bran Redmaw
Wolf Lord in Terminator Armour; Storm Shield, Chain Fist, Wolftooth Necklace,
Saga of the Bear (attached to Aesir Pack)
Jorek Stormgaze
Rune Priest in Power Armour; Chooser of the Slain
Elite
The Wolf Guard
Torgarl Mjodbane;
Combi-Meltagun, Power Fist (attached to
Lupus Pack)
Arjac Rockfist, The Anvil of Fenris; (attached to
Jotun Pack)
Kjel Wyrmslay; Combi-Meltagun, Chain Fist
Alarik Icehowl;
Combi-Plasmagun, Wolf Claw
Svorlrik Thunderfang; Pair of Wolf Claws
Hengnir Scar-eye; Storm Shield, Power Sword
Olaf Keenblade; Assault Cannon, Chain Fist
Drop Pod
Mjol Onn-ax
Lone Wolf in Terminator Armour; Storm Shield, Thunder Hammer
Troops
Aesir Pack
8 Grey Hunters; Mark of the Wulfen, Wolf Standard, Meltagun
Drop Pod
Lupus Pack
8 Grey Hunters; Mark of the Wulfen, Wolf Standard, Meltagun
Rhino
Jotun Pack
8 Grey Hunters; Mark of the Wulfen, Wolf Standard, Meltagun
Drop Pod
Heavy Support
Vanir Pack
6 Long Fangs; 5 Missile Launchers
Razorback, Twin-Linked Lascannon
Total Cost: 1996 points
Although I lost the game, it was a bloody affair. The highlight of the battle had to be when Arjac destroyed 3 Kans in one round of combat. They exploded killing another 23 orks, winning the combat!