Looking to buy a CNC / Please help

[dudz]

Thanks. I was looking at the ebay Chinese 6040 machine, but I read too many bad reviews about them.
I was thinking maybe that I could replace the spindle on the French CNC with a better one and it would still do a better job than the Chinese ones. ?
The other thought I had was to buy a "Merchant dice LTD" machine ( ebay 31037721936 ) and add motors/spindle and a cheap controller . Would this be a better solution ? although more expensive. They have advised me that the max cutting depth per pass in aluminum on this model is 1.5mm. What would the French one do in your opinion ?