a lot will depend on your taste, room, and willingness to tweek..
the avanti & joesph with the side firing woofers will prefer a wide room placement with lots of breating room around them,...the ap speakers will require a near field position (.8 times the width) and to get bass the seating position near the back wall...both are really high resolution designs and are extremely revealing and will reveal any weakness anywhere ( not a bad idea to have tubes somewhere in the line and will require isolation of components and top quality cables (ic, speaker, and pc's). very, very small changes will make or break. both are fairly inefficent with the ap being the least efficent due to a 4 ohm load and sound really when good turned up... i own the audio physic and auditioned the joesph and really liked them... both are very similar. the ap will do deep bass but it is more detailed than impactful when set up.. i am not sure about the specifics on the joesph bass, since i went with the ap libra ( there wasnt that big of differnce between the libra and the avanti imo). with the joesph and the ap you will more than likely need room treatment to get them to sound their best.
the sonus fabers ( foward firing woofers) are more forgiving in terms of setup and equipment, sound good at lower levels, and "may be" more musical and more bass with your gear and without room treatment..stunning midrange... it is a colored speaker, but musical and easy to listen to..
in regards to finish ( my opinion) -
1. sonus fabers
2. audio physic
3. joesph audio
hope that helps !!!!
