Removing background from images

I am finding this too hard, I googled and found some companies that do this sort of thing, has anyone tried them? Is clipping path the same as deepetching. www.deepetch.com seems to be one good one, I also saw www.lazymask.com and www.digital-media-tech.com. Has anyone had any experience with this sort of thing. My catalog has over 300 images of jewellery and jackets with fur fitted on manequins due in two weeks, all shot on a blue studio background. Do I require alpha channel masking? Can anyone help please?