the Vons are a great speaker but I know that they need more room from the back wall then you will be able to give them so I would shy away from them.
Aquick note that my father has the Legacy Focus 20/20 and his speakers are only maybe a foot from the back wall and they really sound great, they are also a beautiful speaker with top notch cabinet work.
I would try to stay with a sealed enclosure if you look into new speakers for clsoe to back wall placement, or atleast not look into any that port towards the back wall
Aquick note that my father has the Legacy Focus 20/20 and his speakers are only maybe a foot from the back wall and they really sound great, they are also a beautiful speaker with top notch cabinet work.
I would try to stay with a sealed enclosure if you look into new speakers for clsoe to back wall placement, or atleast not look into any that port towards the back wall