Red tail shark, or Rainbow Shark

[Trickster]

Red tail is more aggresive, and bigger, and better looking, but the problem is aggresion, i want an aggresive fish but not one that will kill my other fish! I am getting 1 of the 2 no matter wut, i just want someone to level the playing field with my gourami who thinks hes king of the tank, always pushing the other fish around,

Which do u think i should get? read my stocking list if u wana know wut its gonna be, tank size, etc.....


(And if i do get it should it be male or female)