Eheim are always the best choice if money is no object, alternatively you could look at the JBL series, they are pretty robust also. I have not used any other brands than the two referred so that's as far I can go! The JBL 900 would do also, the new models are more energy efficient the 901!
The day was bound to come when I didn't agree with you Paulo!
I've got both Eheim 2217s and JBLs on my tank (actually, I've got the e901 and also e700), and I've got to say that I really do rate the JBL's above the Eheim. "But why?!" I hear you ask (dramatically). Well let me tell you...
- Noise - The JBL is a smidge quieter. I do mean a smidge, I suspect to some people's ears there will be nothing in it since it's so close that even the "type" of noise would probably swing opinion.
- Build - The locking clips on the Eheim are really flimsy in comparison to the JBL, and I've already bent one of my Eheim ones. That said, since they're so flimsy, they're easy to bend back into shape!
- Accessories - Unless you buy the Plus version, you won't get the extra double taps on the Eheim, which is a real pain in the backside when it comes to filter maintenance. Also, the JBL comes with a rigid spraybar assembly, compared to the Eheim just having a straight spraybar, so you have to allow space to bend the hose out of the way.
- Media - The JBL comes with it, the Eheim doesn't unless you buy the Plus.
Now don't get me wrong, I'm not for one moment saying that the Eheim isn't a good bit of kit, it really is, but I'd definitely pick the JBL over them.