I am in Austrlia so I always order from Hongkong unless the Aus warehouse has what I need/want.
I have only used a 1/10th scale sensored motor from HK it wasn't great and not suitable for 1/8 scale but did the job for my 1/10th onroad/drifter.
I have both these servos but haven't had extensive use with them yet but I have used lesser servos from HK and they were awesome so I expect these to be better as they are stronger and last a good amount of time for the price. Both under $35 + shipping.
Yeah the 150AMP would be good just keep in mind the dimensions of the footprints.
Mate I just realised your inRehovot, ISRAELsorry I didn't check first off just asumed you were in the USA. BTW my mother is going to Isreal in October for a few weeks has been a dream of hers for years now but anyways hehe. Hope the servo and other info is a help to you.