Marten Bird 2, B&W 800 Diamond or Wilson Sasha

I do not have much experience with the electronics you are considering. But I heard the B&W 800 diamond speakers paired with Accuphase electronics (C-2810 pre, A-45 power and DP-700 cd player). The combination was marvelous (one of the best I have ever heard). However, having said all that, my feeling is that your room is way too small for any of the B&W 800 models.

Best wishes,
Paul

I would go for the Marten Bird 2 and Vitus anytime.

The other choice would be the German Physiks Bordeland MK IV, it sounds incredible with any music thrown at it as the Carbon DDD ( Dicks Dipole Drive )does an amazaing job and the sound stage is the best I have heard, Period(that's the benefit of open design).

I am not a dealer but I have a pair of the Marten Bird (only for 3 days) at a price too cheap to mention here due to the sensitivity of it. It's a new pair with full 2 years warranty, but I live in Australia and don't know how much customs will be charged for the speakers at Thai.
I also have access to heavy discounted Vitus and German Physiks if you are interested.

Not a big fan of B&W and they are hard to drive (nothing VITUS can't handle) and need lots of space to perform. Forget it

As always, audio preference is very individual I would suggest you listen to all the suggestions others made (they are all great) and decide for yourself what music you like.

Thanks for the comments and suggestions, really appreciate it. I am going back to the dealer for another listening session with the Martens+SimAudio and Martens+Vitus gear this weekend. I quite like the sound of the Wilson Sasha, although I also like the Martens, which I feel is a little more refined than the Wilsons (subjective, of course). Am leaning towards the Martens+Simaudio setup. Also considering getting the finite elements Master Reference audio racks for the equipment.

What is lacking in your current system that you are trying to improve?

I have had my current system for almost 10 years and am moving into a new home, so I wanted to try something new...no complaints with the Levinsons and SIgnature 800, I suppose I just got bitten by the upgrade/tinkering bug and wanted to try something different being that I am moving into a new home as well!