although i really love the gs spring drive (especially the GMT model), i have not pulled the trigger. i do not doubt the spring drive is great tech and soon all watches in the 21 century may be made using this tech or something closely the same.
Hi, Harken, I don't recall reading this sentence earlier....or was it just me and my selective reading!!

Granted, the GS is gorgeously beautiful and the SD technology is interesting, but you seem to have over-stated its (SD's) impact. At the end of the day, it's still a quartz crystal oscillator controlled watch. You can't run away from that. Perhaps the power source is different (battery vs. main spring), but the SD is still a quartz crystal oscillator watch at the end of the day.
I know the smooth sweeping second hand in the SD is often touted as fascinating. But Seiko (and maybe citizen also) perfected that technology years ago using existing quartz technology. Yes, Seiko made a quartz with sweeping second hand years ago (1980's & 1990's) with the 5S21 movement......
http://home.watchprosite.com/?show=nblog.post&ti=437651....but your battery will be drained out prety quickly believe.

Here's a youtube showing the 5S21 in action.....
http://www.youtube.com/watch?v=ILwR73_MrJE