Dual extrusion or not?

[Sebastian Finke]

best dual extrusion machine currently in existence (that I've seen or heard of anyway) is the bcn3d sigma from spain.
As it uses two seperate heads and parks the one not in use - there is no special software needed, No wipe walls, purge columns - none of the crap.
And it's a decent build volume and price as well.

Never heard of it before. Looks like an interesting concept. Pricey in my opinion but not horrendously so. Good build volume. Don't like the Bowden setup though.