no real disadvantages to going with the 180 over the 150.
only reason I am not is the initial cost.
Aqueon 180 tank stand and glass top from the LFS is 1100 brand new.
Aqueon 150 tank stand and glass top from the LFS is 650 brand new...
thats almost twice the price...
remember that the "150" is really a 160+
72x18x29 is fair bit more than 150 gallons, based on the outside dimensions (like all other tanks are based on). why Aqueon calls this only a 150 is anybody's guess... it works out to 162 gallons in reality...
but if you can swing it, the extra width is probably worth it.
only reason I am not is the initial cost.
Aqueon 180 tank stand and glass top from the LFS is 1100 brand new.
Aqueon 150 tank stand and glass top from the LFS is 650 brand new...
thats almost twice the price...

remember that the "150" is really a 160+
72x18x29 is fair bit more than 150 gallons, based on the outside dimensions (like all other tanks are based on). why Aqueon calls this only a 150 is anybody's guess... it works out to 162 gallons in reality...
but if you can swing it, the extra width is probably worth it.