The Aqueon "quiet"flow 10 sounds like a small jet engine warming up. A Marina Slim S20 is on my list for this Christmas. :P
And my gourami is in my 10 gallon, but he may be moving to my LFS. He is very very timid, and he darts around the tank whenever there is ANY movement. I am afraid he may hurt himself in my tank, I have already had to rescue him twice because he freaked out and tried to cram himself under some driftwood. I think it may be because a 10 gallon is too small. Which is a shame, because I JUST set it up. Oh, well.
At my LFS, he has a nice big 50 gallon tank to swim around all he wants. It's a growout tank for all their extra plants, so he will have lots and lots of hiding places. Much better than my 10 gallon that I thought would be OK for him.