vandersteen 2sigs to magnepan .7 good move?

Vandys and Maggies seem to share a lot of similar sound qualities.
I remember hearing Maggies years ago and I still remember them positively.
I ended up with the Vandy 3a sigs and 2w subs.
In my opinion, you are going to need subs. 
Can you get a pair of Vandy 2w/2wq's? Or, if that is too much, a pair of Hsu subs. This will get you closer to bass reproduction, that the 2 sigs lack.
If you still have the 'itch', then you could get a pair of Maggies. The Vandersteen subs are a great match for them.
If you can afford it, you should listen to both and see which ones you prefer. But, I think you should first get a sub( or,preferably, a pair), as this will be the most cost efficient upgrade you can perform. Trust me, I've been there....

What qualities do you prefer? I ask because I've owned the 2CE signatures, Maggie 12QR (pretty close to the .7) as well as the Maggie 1.6s. 
If image depth is an important factor, the Vandersteens win by a mile. Another plus for the Vandies is bass depth. While the Maggies, both models, present exceptionally clean bass, the 2CEs go deeper. I will say though, the Maggies go plenty low for most music. And that clear, clean bass is intoxicating.
For me, the 3 dimensional image form the Vandersteens wins. Best bet would be to get a pair of .7s from your dealer and demo them at home. Very important to hear them in your room. 

I still think you should add a sub. My room is about the same as yours and by adding the subs, everything sounds more real and integrated.

I've owned only Vandersteens, Revels and Magnepan.  Currently have Vandersteen 3.7s in large room.   Have heard .7s at the shows......
I believe you'll be very happy with the Magnepans, but you'll need a lot of current for them to sound their best.......