will it fit? Sea Dweller 116600 info on movememnts...

[watchnutz]

So im looking at picking up a 116600, I found one here:  http://www.ttw8488.com/index.php?main_page=product_info&cPath=1_8&products_id=12226

Just wondering what better movements fit into these? Anyone have a clue? Ideally down the road I'd like to fit a trust worthy ETA or Japanese movement that will keep good time. I honestly don't trust any of the "better or swiss" movements that come from china for extra money. I'd rather buy the cheap version and update to a better movement later that I KNOW is a good movement.

Whats a decent replacement for the Asian 2813 movement that comes in this?  Thanks guys!