Reefbeauties
Nyaquatic (must wait for "livesales" price is insane otherwise)
saltwaterfish.com is ok-ish
Oh and best one is probably violetaquarium.com
I think that's about it!
Let me know if you find anything local in brooklyn. I heard there is a tank builder, but I am unsure who it is.
I am looking at external overflow too! So far I think the only good option is SC aquarium.