Haha, Theres no room for another tank. Thats the whole reason I got the 180, its the biggest tank I can put upstairs without damage happening to my house, and still having room.
I was orginally going to build a 375 for 4 black arowanas and one silver arowana, along with two motoro rays, but the plan fell threw as there is no space at this house. But possibly in a year or two there will be room for a real monster tank.
But right now thr biggest tank is 180 gallons. So its either a Jar, or polys. And Its probably going to be Jar.