I posted here yesterday, but for some reason it didn't save...oh, well.
If it is durability you want, then 1077 is right on the mark. No one beats Eheim. My two Pro II canisters, one with the heating element, have been running continuously since 1996 now with not one issue.
Three years ago I decided (for reasons I won't go into, but money was one of them
) to get a Rena XP3 Filstar. I have no problems with this filter. Of course, it does not have the track record of Eheim as Rena hasn't been on the market that long, and every review I've read point this out, rating Rena second to Eheim.
You can't go wrong with either. If maybe
having to repair/replace the Rena in say 10 or so years is something you don't want, go with Eheim. There is a significant cost difference.
But, there is one issue with Rena, and that is the hose length. They come only in 5-foot sections. This is not a problem if you can put the canister under the tank (or behind it) right in the middle. But if you need to have it at either end, you will not have sufficient hose length to reach the far end on a 4-foot or longer tank. Rena do not sell longer hoses; with Eheim you can cut to what you want. I haven't looked into buying PVC somewhere that may be the right diameter.
For the hard media, I use Fluval ceramic disks and BioMax because it is much less expensive than that made by Eheim or Rena, and it is basically the same thing. Save money where it won't compromise quality.