Buy all the DLC! I think it was like $90 for all of them, I have no regrets.
I don't have a lot of money to burn, bro.
The best ones are easily Future Past and Scramble Pack , Golden Pack is also good when your finished with main game (or don't want to farm ) to get some exp/cash. If you want to challenge get the challenge pack and if you want to go for Apotheosis I recommend getting Rogues and Redeemers 3 for Limit Break skill. There's also Lost Bloodlines 2 and Smash Brethren 2 where you get 2 new classes a Dread Fighter and Bride. Lost Bloodlines 3 and Smash Brethren 3 in which you get respectively a Paragon skill which grants additional exp and Iote's Shield which removes a character's flying weakness.Don't bother with other DLC IMO. Here you have more detailed descriptions of DLC http://serenesforest.net/fe13/dlc_na.html#list
Thanks for the advice. I guess I could handle it from here and choose what I want to buy now.