Which heater?

Hello again-
Just wondering which heaters you guys recommend. I'm looking for a heater for my 105 gal. I know most sources recommend 2 heaters, in case something happens to one of them.
I don't mind spending a little money to get the correct equipment.
Also, on a side note, we decided that the pump we have is too powerful for our tank, so we're looking at getting one that isn't quite so powerful. The one we have now is about 1000 gph. We were thinking a mag 7?
Any help you can provide is appreciated!
-Penny
 
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