Ok well the first spindle is the better choice because of the VFD, It's made by Huanyang and is well tested on 10,000's of machines, the other two are copies and lower quality, that said even the huanyang isn't the best quality in the world but I personally have fitted 100's with less than a handful of issues so wouldn't hesitate to fit one or recommend buying one.
The Black one I've only fit on a couple machines and wasn't impressed with them, the white one I've no experience other than I know someone who had one and it blow up after 7 months.
The spindles are all the same. One other thing to mention is the water pump.! These pumps included in the kits are 230V Mains powered and DONT have an earth which isn't cleaver in a submersible pump IMO. I won't fit them.!

Motors:
The first motors with intergrated drives are not steppers they are DC servo motors. Never used so can't comment but 180W isn't a lot with only 48Vdc and won't suit a large machine.

The second motor is a run of the mill stepper, nothing special.

Drives:
The CW8060 are not very good drives at all and certainly NOT going way over kill.? 80Vdc drives are what you will need for a decent sized machine to get the higher feeds you'll want.

The cheaper Dm542 are ok for a small machine but are limited on the Max voltage at 50vdc, for a large router like what your planning then you'll want to be running your motors with around 60-65Vdc to get the best speed and torque from them.

Now personally I wouldn't fit any of these because they are basiclly OLD technology, Newer Closed loop motors with Digital drives are much better and won't cost much more money.
Also look for drives that provide AC input and it will save you the trouble of building a DC power supply and a little money.

However, why are you even looking at buying this lot when as far I can see you haven't even decided or designed the machine yet.?
You are a long long way off needing any of this and while it's tempting to buy so you can test on bench all your doing is wasting warrenty and they will learn you very little.
Also, without knowing the Mass etc of the gantry you could easily buy the wrong size motors/drives.

Again I'll advise you to NOT BUY ANYTHING and say go do more research on the motors/drives and why voltage is very important. But only so you have a better understanding of why getting this part right is so important and not so you are better armed to buy now. Only buy when you need or close to needing them.