Like with all reps, the movement needs to be serviced if you want it to last as it really is hit or miss. Even when I got Pam with 6497 movement, my watchmaker had to replace couple things while servicing it that we're just broken straight out of the rep factory.
That said, after you get it done, you will be. One of my reps that was serviced have been running great for 9 years. Another one, 3 years and keeps perfect time.
You can also opt for installing brand new movement. Which is what I'm having done right now in some of my watches.
I would not reco getting a rep with 7750 Asian, I was told that getting spare parts is not possible anymore... It may not be the case.
6497 movements, Asian ones are solid. Get it serviced and it will run almost as well as Swiss. I have both, gen Swiss 6497 and Asian and they both run equally well, keeping perfect time.
Any watch with base Asian 2824 would be good, as they can be swapped with seagull 2824 movements that are really good and cost only $90.