Hi, this is my first post so forgive me if this is a newb question. First of all, I found this forum while researching the G-Shock 5600 series. I love the classical timeless design and I need your help getting the right one. I've been reading several posts on this great watch and I found the ebay link for GW-M5600. (http://cgi.ebay.com/ws/eBayISAPI.dll...MEWA:IT&ih=010) But before I drop $100 on this, I would like to know what the difference is between the -1JF and -1 model. I really need a watch (my last one got stolen) so please reply quick!