Mass Effect 2 DLC questions?

I got ME2 for xbox 360 a week ago, and i want the dlc like arrival, lair of the shadow broker etc. But i havent beaten the game yet, so my question is should i wait until after i beat the game or should i do it before. Also, after you beat the game, are you allowed to continue exploring, or does it just end? I want to know so i can know if i should wait until the end of the game to get the dlc. I could just load up an old save though.Mass Effect 2 DLC questions?
Lair of the Shadow Broker can be done either way, but I wait till after the end of the game, since some of the dialog doesn't make sense unless you have beaten the game. I don't know about Arrival since I haven't played it yet (getting close though), but considering that will be the first event that takes place in ME3, it might be best saved for after ME2 as well.

Anyways, just in case you couldn't tell, you can continue playing the game after the end of the game and do whatever remains, as long as Shepard survives, which is hard not to do unless you are actively trying not to live.Mass Effect 2 DLC questions?
I'd wait till you get fairly far through before getting it. Its all up to you. At the end if you survive the last mission you can keep playing.Mass Effect 2 DLC questions?
the dlc can be played first, doesnt make a big difference. If you survive the final mission you can continue.