I understand what it is that you are trying to do with this thread. However, in my opinion, it is impossible. Why? Because this forum is open to everyone in the world that decides to join it.I'm disappointed because I thought it would be really cool to have a thread that was like a consumer reports sort of thing.
Let me explain what I am saying like this:
Take a simple question like this. Is the Rena Xp series the quietest canister filter? If you get 1000 Rena Xp owners to reply, 99% of them will say it is the quietest. The other 1%, of course, will say it's not. Now, one could assume that since 99% say it is the quietest that it is indeed the quietest canister filter.
However, what did the 99% compare it to? Do they all own every type and brand of canister filter? Not very likely. Most will not have even owned one other unit at all. Thus, the majority of those that replied "it's the quietest" are merely stating their opinion. An opinion that is based on no comparison whatsoever.
One cannot assume that just because a whole bunch of people say the same thing that it makes it a fact.
Like I said earlier, I understand what you are trying to do. I just don't think it is anywhere close to being possible in a public forum such as this. No offense is meant by this. I hope none will be taken. It's just my opinion.
Regards,
DeMonZ