I haven't seen those Q series machines before. Looks like a major upgrade from their original machines. At a big cost increase.
From just looking at the pictures, I see a few major issues.
1) The linear bearings rolling on the round shafts imo will not be very rigid.
2) Their "5 layered, powder coated steel" sides appear to be wood, with thin layers of steel on the outer sides.
At almost 14,000 Euros, I think you can do better.
I'd get pricing on shipping a Avid CNC 4x8 Pro series machine.
PRO4896 4' x 8' CNC Router Kit | Avid CNC | CNC Router Parts
The machine, leg kit, Nema 34 plug and play kit, and plug and play spindle kit will be just under $11,000 US.
That's about $4000 US less than the Stepcraft, for a much more powerful, and more rigid machine. I would think that shipping should be under $1500??
This should be what you need to go with the base machine:
Leg Kit (PRO CNC) - CRP813-00 | Avid CNC | CNC Router Parts
Plug and Play NEMA 34 CNC Control System - CRP800-00E-8 | Avid CNC | CNC Router Parts
Pepperl + Fuchs Proximity Sensor Kit | Avid CNC | CNC Router Parts
2.2 kW Plug and Play Spindle / VFD System | Avid CNC | CNC Router Parts
http://www.cncrouterparts.com/trammi...unt-p-360.html