NextWave has improved its machine rigidity with the release of the HD510 but it still has noticeable looseness and still contains a lot of plastic in its structure. For a hobby machine, they are not a bad deal because they do come with Vectric VCarve Desktop so you don't have to look for a CAD/CAM package for project design. It does not come with a router or spindle normally.
They have had some problems with packaging the machine to limit shipping damage. There have been a few problems with the pendants also, and the computer control software they have is really problematic. NextWave has been saying for years that they were working to make their spindle controllable by gcode but so far they the only indication I have seen of that has be in the new post processor they have and that looks like it is still in the early testing phase.
The Axiom Iconic 6 is a tighter machine with more working area and does come with the spindle but not the design software. This would be my choice if these were the only choices I could choose from.
As Richard points out it really depends on what you really want to do with the machine. If you want to use it as a hobby machine then those two machines would probably be okay but if you would like to make some money in a small business then I would say look at other machines.
If you think you can build one from a kit then I would look at the Avid machines. They are well-engineered and they have a lot of happy customers. At this point in my life, I would go with an Avid Pro, years ago I might have designed and built my own.
So the bottom line is, what do you intend to do with a CNC?
