in streetphotography when you shoot in color people look at the clothes... in B&W they see the souls...
If it's only for street then the lighter is the better.
I also do Architecture and so I use a Nikon DSLR (D750) with a wide angle lens... not that easy to take discrete streetshots 😉
But at least you have this camera, my recommendation, use what you already have. People usually make better pictures then :)