speakers close to the back wall ?

Agree with above - try stuffing the ports with socks and see what you think. Another very cheap plug is foam pipe insulation available in different diameter sizes from a hardware store. It can be tailored to still leave a small hole for air to escape, or plugging outright.

How about Von Schweikert VR-33? Check it out.

Try the Omega Super 6 XRS Alnico or the Super 8 XRS Alnico. They are designed with a down fireing aperiodic port, so distance from the back wall is not that critical. Also Louis at Omega is a one off custom builder. He can make any of his designs with a front port to compensate for rear wall distance. Give him a call he is a great guy and is very passionate about his designs.
(203) 847-2800
http://www.omegaloudspeakers.com/products/super6series#6xrs

The Audio Note E's gave boomy bass in my room against the back wall and corners and not until they were 3ft. back was it controlled.

Try before you buy.

I'm using a floorstanding single driver no crossover speaker with front slotted ports from Planet10 Audio called the Fonken 167.

Obviously all rooms and all speakers require careful matching. AN/e's are quite balanced in my room....a bit more than a foot or so from my front wall. Large room 20' x 30' brick one side, glass the other.....horses for courses.