ok , in that case a demo of both is the best way of deciding what you prefer , the edge lit model is said to have slightly better shadow detail than the c650 , which apparently has better blacks , the sony 40ex503 is likely to cost over £700 , perhaps £750 , but gets great reviews , if thats not out of your price range id check it out too , id say if you hunt around you may even find a panasonic 42g20 plasma for £750 , another great set ....