Try not adding a wet dry setup if the sound of dripping water bothers you. I didn't set one up because of the noise and didn't like how it lowers the water temp. In my sump all I got are filter socks and submerged bio media
I would stick with a sump...so much more versatile. You can set them up to be very quiet...it just takes some fine tuning. Sumps also give you the ability to remove heaters from your display.
But if you go with FX5s, I would plug the drains and place the FX5s intakes in each overflow (assuming you running two of them) and that way you will still reap the benefits of surface skimming.
I don't think you would want to run dursos because you would want a full siphon going into the FX5s. A durso would feed air into your FX5 and you don't want that.