I have been thinking about getting a GS with a leather band as a dress watch later this year (among others) and was wondering about the various movements: automatic/manual wind, Hi-Beat, and spring drive. How do these compare? For example the SBGR061 (available in the US) has an automatic and SBGH013 (based on GS's Japanese website) has a Hi-Beat but they have a similar color scheme and design. Would you say the Hi-Beat and Spring Drive are better movements than the basic automatics or would you say they are as good except the latter two are preferable as they are unique to Seiko? Right now I am considering those two, the SBGA057 (spring drive and based on the Japanese website), the SBGW021 (automatic with GMT), and SBGW001 (manual and based on the Japanese website).