Picked pictures for wall - need input on printing and framing

Following Mr Cool's suggestion to try a black mat and add pictures, I am currently thinking about framing three pictures with black frames and mats in the following way:

(I put the frames in a dark grey to distinguish them from the mats)

To me this seems much better - what do you think? And how do you like the combination of one b/w with two pretty colourful shots?

Cheers, Johann