Tank size would be 40 gal breeder. I only want to look at Eheim canisters and am looking for opinions on the few models listed below, setting aside for now the $$$. I am primarily interested in ease of use, including self-priming and media options, as well as ability to use a pre-filter if there are fry in the tank. And of course, the filtering ability itself.

Here's what I am trying to sort through:

Ultra G 90
Pro III E 2074 or 2076
2073 or 2075 - are these similar to the 2074/2076 without the electronics?
2215 or 2217

I'm leaning toward either the 2074/2076 or 2073/2075 at the moment and would love to hear from anyone who has actually used these.

Thanks for your help.