125 gallon SA/CA setup?

[ctenopoma]

my new tank that I am planning will have the current stock:
1 oscar
1 gold saum
1 jack dempsey
1 senegal bichir
basically all the fish in the sig.
I was wondering which filter would be the best for the bioload. I know I will have to buy a canister filter, but I want to know which one you guys reccomend . and also I need advice for a really sturdy heater that can take a beating from my O.

Thanks ctenopoma

 

[CTU2fan]

With that tank I'd use and fx5 with all bio in the baskets (scrubbies, biomax, whatever) and maybe add an ac110 or 2 for mech. Really up to you though, you could do the comparable eheim (2262 maybe?) if you prefer eheims.