Generally, the 55G is not that bad in my opinion. I'm not trying to diss anyone with 55G tanks.. or even 55G tanks for that matter. Maybe some people like the thinness of the tank, and they don't like visual depth in aquariums.. Who knows. But to me.. it is hard as heck to clean.. because it is so thin you have to really get up top and over it to get anywhere near the spots you really want to get to. Also, the depth of the tank is not my concern. I like how deep the tank is. And as roka said.. aquascaping was a ridiculous task with this 55G. I was excited for aquascaping.. that was until i found how difficult and un-appealing it was to "try" and aquascape with such little room to do so. Also.. i like the look of a nice wide, white, open sandbed. Where there is room to view what is going on in the sand, and for the "sand criiters" to do their thing.. and still have a nice rockwork to retreat to. That is what i had pictured when i was first starting this tank.. but now my tank looks like the complete opposite lol.
But overall.. i'm not complaining. I enjoy this.. but i just want a tank that i could enjoy it even more with. That's all. And i think it will be a 40G breeder. It has dimensions that i really prefer, and i am still able to use my current light fixture. Even if it will give off a ridiculous amount of excess light in to the room because of the sides of the fixture that are hanging off lol. Anyways, thanks for the input ladies and gentlemen. I will update this thread to let everyone know what the dillio is. :p