Magnepan 7.0 3.5R x 2 pairs vs Tympani

I just acquired another pair of 3.5R as I cannot found the Tympani in local market so I decided to create my own version of Tympani.

I studied the different versions and advantages of Tympani(in case you don't know, it's a 3-4 walls of magnepan for each speaker and used to be the flagship). The orginal 3.5R is very good(if you do bi-amp with some adjustments) but bass and soundstage wise is still not comparable to larger speaker like MBL 111/101. Also, if you have a wide room over 18ft, the middle soundstage tend to not as expansive as some other design. Magnepan's solution to this seem to be adding more "plane" of speakers as in the Tympani's case or increasing the size as in current top 20.1 case. My approach is similar yet the tricky part is how to angle them so that they produce co-herent soundstage and image.

Using Magnepan's recommendation on angle of the tweeter to the listening position with tweeter inward and outward, I calculated the crossing angle should be 5 degree for a listening position of 2.5M away. The image cast by the outer 3.5 should be slightly in front of the image cast by the inner 3.5 to form a 3D image where a single pair is difficult to achieve. My initial feeling is that this arrange benefit from wider/deeper soundstage and much co-herent bass enveloping the room.

Any Magnepan lover can share your thoughts on this?

My layout is in the below virtual system:

http://www.audiogon.com/cgi-bin/fr.pl?vdone&1216824544

The room is treated with thick carpet, walls of book cases at the side and 2xRPG abfussor at the back.

Jeff