hmm...also maybe you should try to make each barrel a little different, like the two with the knots behind the one with the light on it, maybe take away the knot on one on them and change where the slots end because it looks kinda odd with the same barrel everywhere
^^^^maybe do that with all of them if you can and then it will be flawless! (to me, at least)
edit: now that i look agian the boards on the wall (the slots) have no nails, its just a tiny, insignificant detail that isnt necessary but it is these tiny details that make your scene believable
and maybe reconsider the glow at the bottom of that barrel on its side because it doesnt really look like it is in the light
(either do that or move the light beam beside it further from the wall a little so it is obvious that that glow is in the right place)
it also might help to look at a barrel of wine really close and try to notice the minute things that make a wine barrel a wine barrel
i am being harsh because i believe that you are good enough to fix these and make your room look like a picture
here is a link to a video that you might be able to use to take the spatter out of the ends of the beams of light on the barrels to make it look like its not a sponge:
http://revision3.com/pixelperfect/layermasks