those kits are all overpriced, they are the dm542 drivers, same the eBay kits. All except your last link which looks like a rebranded wantai driver/ jingsu driver. All come from the same place only you seem to be paying more with that kit for the same product. Infact the dm542a replaced the m542.
this kit is virtually the same at half the price.
USA Free Wantai 3Axis Nema23 CNC 57BYGH115 003B 3A 425oz Dual Shaft Driver 542 | eBay
As with the kits you linked to, all of these will also need a motion controller such as the uc100.
If it was a 48v system you wanted as the same as the automation technologies kit with same driver spec, then look at the cw5045. They are $35 ea. the bob in that kit is a very cheap one, a few dollars. And psu motors etc all in you can buy individually from eBay for cheaper than that kit. Infact there are kits of these without psu for $199 on eBay.
The probiotix kits are again well overpriced. Here's exactly same kit on eBay:
http://vi.raptor.ebaydesc.com/ws/eBa...=1460955422809
The dm/m and wantai drivers are basically the same, what's not so apparent in pricing and description is that the cw5045 is actually not the same and is Infact a better driver. I don't think that's reflected in the price and I can only put this down to being sold directly from jingsu instead of being rebranded jingsu drivers like the others. The main difference is they have slightly higher output current at 5a and if you open one up they have twice as many components inside compared to dm/m/wantai