What YuGiOh structure deck should I buy?

So im in a sticky situation here. I have a lot of different cards that don't fit into 1 main deck so i'm going to buy a structure deck. Some cards that I have right now are four of the six samurais, good spells and traps that fit into any deck, and some elementary heros(not that strong), but i have bladege, etc. Since I only have enough money to buy 1 structure deck and 1 booster pack what should I buy? My friends suggest the Lost Sanctuary but I can only buy 1 and my current cards won't fit with the fairy deck. So what should I buy????