Hi i am not gonna advise on the leadscrews, but your choice of electronics for the following reasons.
Individual drivers are preferred as they can be changed individually should a fault occur and it's easier to add that 4th axis
With the router that you are building you will be wanting speed and that speed comes from higher voltages than 24V which is what you will get.
Mariss at Gecko (USA) recommends up to 25 times the rated voltage for driving your motors.
Buying from china you can be hit with VAT and the language barrier can have consequences.
I suggest you buy from the UK (It's still all comes from China )
Arceurotrade and Motion Controlled Products, Zapp Automation are some suppliers to look at.
They are also a source for ballscrews and all other hardware you will need