My 125 is pretty heavily stocked and thinking of upgrading. Chicago land is not the greatest for used tanks so finding a good deal on a 225 wide isn't the likeliest of situations but would be ideal. If buying new I dont really want to pay more than what a 180 costs. Dont plan on adding stock and parameters are perfect. Unless I eventually get a species that gets to big for a 125 is a 180 worth the hassle and money? On a 6' tank how big of a difference for 8-12" cichlids will the extra 6" width make? If I had to do it again I would have gotten a 180 over the 125 but that ship has sailed and keeping both is not an option.