canvas on wall

there's this piece of wall in my room as i enter that needs some decoration...

we have a light already fixed for a painting or some sort, it's that long-ish object thing you can see in the photo on the wall.
my mum and i were thinking of going to a shop to get some digital photos printed on canvas and hung up on that wall :) i'm real excited. just moved 37 of my best photos that i want to put up on a canvas to a thumbdrive. i hope they allow a collage type thing, cos it's hard to fit 37 photos otherwise haha. i'm thinking a huuuge canvas maybe 40 x 40" or something haha to fill that space. i can't wait till it's all done... :)