Ive owned all three brands at one point or another..
Allglass bought Oceanic not the other way around..
Oceanic always had a better build quality and are heaveir then the other brands.. My 75 gallon Oceanic was a pain to move. Oceanic is known for using alot of tempered glass, even were its not needed. And they used to come with a 30 year warantee IIRC.
All that said, I wouldn't have bought the Oceanic new, I got it used for a more then fair price. I don't think the extra's are worth it, fishtanks last a LONG time regardless IMHO
best quality/price I would go with perfecto (wich isn't on your list)
If its 55gal or under.. I would just get the cheapest one.
btw.. I would think you could find a tank only in 55g for less then that 8O
check the big department/hypermarket stores 8)