JLC probably makes more inhouse movements than the rest. Well, the argument always go both ways. Some people argue that if ETA can make good and reliable movement, why do we want to pay premium for inhouse movement? Beside, a lot of so called in house movements arent comparable with widely used ETA.
JLC is classic. I think you either love it or hate it. If not holding value is not an issue, JLC is probably a good choice, so as Zenith, IWC etc.