Depends. You like multiplayer or campaign stuff? How much is the season pass going for these days?|
The 4 DLCs you can buy basically boil down to 1 Horde pack, 1 Campaign add-on and 2 multiplayer map packs.
In my opinion the Horde Command Pack is easily the weakest as it only gives you some fortifications for Horde.
RAAM's Shadow is the best of the bunch.
Yes you can play together if they don't have the DLC. You can't play on the DLC though (obviously).
Edited by LeSpank at 08:27:25 03-04-2013
#9481270, By Gears of War 3