What will work best is in large part due to what you want to keep. Either tank would work fine for a SW
tank. If you want fish like Tangs and Angels, the bigger the better. But both tanks are 48" so no real difference. If you want to do a SW
though, either tank would make quite a nice display. You may wanna go with the 120 simply because with the shallower tank you should get less dead spots and better flow.
Just food for thought.
Woo Hoo, PAYDAY! Time to pay the LFS
rent (even before I pay mine
Join the Alabama Regional Forum!