Luck of the draw... the other problem is that the watch you like may not be produced any more ... eg. original version of the PAM187 with Asian7750 movement, or the IWC GST Chrono.
The other alternative, for those real good ones, is to replace the Asian 7750 with ETA 7750 if and when the Asian 7750 dies, or pre-empt it and do it from the beginning
I haven't had any of my Asian 7750s serviced... wait I think I only have one, the IWC GST, but I would like to put in an ETA 7750 in there cos the watch is that damn good!