Wall Wart amperage question.

Using Arduino Motors, Mechanics, Power and CNC
14

Yes, they have caps.
Fuse on positive.
2A?
http://www.dipmicro.com/store/DCA-0520
4A?
http://www.mpja.com/5-Volt-DC-Plug-Power-Supply-4A-Regulated/productinfo/18520%20PS/

I use both of these.