I wouldn't upgrade a thing right now. It all looks good. You have an aluminum frame, front shock, double-wall rims, 40mm tires and 27 speeds. It'll get you anywhere. If you find you are doing primarily roads, you might want to bring that tire width down to 32 or so, but just enjoy for now.
Tektro (the makers of your brakes) makes brakes for other companies like SRAM.
You got that light blue color? Nice!