I also stay away from 7750-movements.
Some have great luck with them, but I have had no luck at all.
When it comes to TDs it's a purely personal choice.
I have dealt with a few of them and they all deliver what you pay for.
Some are slow with email response some are lightening fast!
Some provide quality control (QC)photos others don't.
Some ship your watchs within days, others after a week or two.
You get the point.
You could read reviews of the dealers. They have their respective sections here.