Hello guys!

I would like to get some recommendations for choosing an open source 3D printer.
I am interested in experimenting with new printing materials in the format of a filament spool tech. (FFF).
I would probably need to be able to play with simple variables such as :
heater temp (100-240 C), ability to use a variety of materials, speed on different axis, speed on curved lines and so on.
It's also important for me that the interface would be user friendly, like the reprap perhaps?

Could anyone recommend me the best value-performance open 3D printer for my needs?


Thanks!