Beginner 3D printer advice

[curious aardvark]

option 5 (or 6 ?)
http://wanhaousa.com/products/duplic...us-steel-frame
$499

The whole dual extruder route looks good. But in reality 90% of all prints are done with a single extruder and the second nozzle can cause all sorts of issues. My main machine has had the second nozzle removed and the other uses dual printing only on very rare occasions.
At some point most people with a replicator clone will remove one or other of the nozzles to make life easier, either temporarily or permamently.

The wanhao is one of the best ready built cheap i3's around at the moment. Good build volume, and doesn't get shipped from china :-)
It also has one of the best track records, having gone through 4-5 iterations in the laft 3 years or so. Wanhao are constantly listening to users and improving the machine. Not sure the same can be said for any of the other big, cheap printer manufacturers :-)

The last monoprice you listed is an earlier version of the machine - just rebadged at the factory.