Get the trilogy, as for DLC, ME1 Bring down the sky is now free so you might as well grab it, Pinnacle Station on the other hand costs money & isn't worth it judging by what ive heard ( & seen on Youtube ).
ME2 DLC, Cerberus Network comes with ME2 which is nice, Lair of the Shadow Broker costs money & is worth every penny, if only for the battle on the Shadow Brokers ship, which is just awesome.
I also like Kasumi & Arrival which both cost money, Arrival is a nice little "bridge" DLC that leads into ME3, it's not a must have, but its worth it to me. Kasumi - Stolen Memory is a nice little loyalty mission. & there's also Overlord which ive got, but im not fond of it tbh.
ME3 Must have DLC's for me are Leviathan, From Ashes, And of course Citadel, Omega I can quite happily do without.
ME2 DLC, Cerberus Network comes with ME2 which is nice, Lair of the Shadow Broker costs money & is worth every penny, if only for the battle on the Shadow Brokers ship, which is just awesome.
I also like Kasumi & Arrival which both cost money, Arrival is a nice little "bridge" DLC that leads into ME3, it's not a must have, but its worth it to me. Kasumi - Stolen Memory is a nice little loyalty mission. & there's also Overlord which ive got, but im not fond of it tbh.
ME3 Must have DLC's for me are Leviathan, From Ashes, And of course Citadel, Omega I can quite happily do without.