1. If you're the type that want many existing info regarding a 3D printer, it helps to select a 3DP with lots of public information. If you're the more adventurous type, then getting into a really new 3DP is equally good. We have 3 machines that fit your budget http://eezitec.com/collections/3dprinters

2. I would go ABS ONLY IF you have adequate venting or at least a very open space because the fumes from ABS 3D printing is not exactly something you'd want to breathe. PLA is nearly equally good but at times can be brittle depending on the structure of the build. Example -- going with the grain vs going against the grain, etc.

3. It would be good if you have at least 4gb memory. Ideally, 8gb & above is good to run multiple programs that you'll probably need open.

4. Anything new & exciting will always be a good investment

5. Airwolf 3D HD2X is a dual extruder 3DP that we carry http://eezitec.com/collections/3dpri...irwolf-3d-hd2x