what filters to use

i just upgraded my set up from a 90 gallon to a 125 gallon. what kind of filtration would be a good idea to use on the tank? as of now i have one fluval 305 canister filter and one hang on filter for a 60 gallon tank. i also have 2 fluval 4 plus internal filters; one on each side of the tank to help with water movement. right now i have the canister filter set up on one side of the tank and the hang on filter on the other side.... i was thinking about evening it out and getting another canister filter and another hang on to make both halves of the tank "even" is this a good idea or would that be too much water movement and bother my fish?

as of now the tank has:
1 small largemouth bass
1 small albino channel catfish
1 small pleco
2 small striped raphael catfish
3 small pictus catfish
2 small pacu
6 other various small cichlids
1 stumpknocker
2 small irridescent sharks

what would you sugest that would be best for my tank?

I don't think it would be too much water movement for the type of fish you have. I have a preference for canister filters for large tanks, but that is my personal opinion. I would love to see a pic of your tank and fish.