The first and forth lathes, I believe are the same type. They only have a 4" capacity which means you only have approx. 2" of clearance from center to bottom rail. This may be large enough for lures, but that is about all. For making lures these would probably work.
Stay away from the drill conversion.
The third one has a six inch capacity which means 3" to the bottom rail from center. This would be my choice.
Those chisels seem to be to cheap to have much quality to them. They will probably be easy to sharpen, but won't hold an edge for any length of time. I would spend extra money on chisels rather than the lathe. You are going to need some type of grinder to keep chisels sharp, therefore consider making your own chisels out of an old file, which has good metal in it. Just grind the file to shape needed and make a handle for it. This is some of the best cheap metal around. When you get into turning you will find you only need 3-4 chisels instead of a full set. Hope this helps, Musky Glenn