Looks like it will fit indeed. Youll probably have some space left...
Indeed the bottom is a bit sparse in space, youll have to relay those cables as much as you can not to obstruct airflow to the card.
Also try and keep them out of the middle of the space... see if you can eliminate the majority of that ball of spaghetti, perhaps you can get rid of them by tying them up in the space below your DVD or above the HDD. It also looks like you have an extra open slot below the card, maybe you could take out the metal there to provide extra air - but that depends on how dusty it might get behind your PC, as you don't wanna drag in dust and whatever might float inside the house (I have 3 cats, so I gotta clean my system pretty often :\)