IMO corner tanks are more of a PITA than you think. I had a 54 corner and every day I hated it more. There are limitations on aquascaping, most people just stack the rock up like a pyramid against the back corner, rectangle tanks offer sooo many diff. ways to scape. (commimg from a person who has re-scaped my tank too many times to count!!, and every time I like it for a month, then I see someone else's and change it). The thing that I disliked the most was with the tank in the corner you can't see through the two side walls at all (without getting your head stuck between the tank and the wall!!) There is a whole other world living on the back sides of our tanks...sponges,critters etc.. and to me its cool to look at it. Granted with a typical tank that is against the wall you cant view the whole back side but you can look through the sides and get different perspectives on your system, but with a corner its the front pane and thats it! Plus a lot of the cool or colorful fish need 4ft plus to be happy( although we all know
"that guy" with three tangs a foxface and a school of anthias in a 70tall!! or a 54hex!!) Plus those same fish help with algea controll etc. And also maintenance is harder with a corner esp. the 92 you need a step ladder to reach the back half of the tank, thats the reason I went with a 75 instead of a 90 or 120 because with the height of my stand( an oceanic mission cherry) I wouldnt be able to reach the sand bed without the help of a step stool or ladder, and space is already limited so I didnt want to drag out the step to do things. All of this is my opinion, but take it from someone who had a corner for a year. I've been so happy since I moved the 54 corner from my living room (CARPET!!) to my dining room (TILE yay!, spills are inevitable
{sp})All it took was a nice gift for my second half to get permission to move systems LOL. Sorry for the rant!