I agree with the mentality if you have the means, however you should know there is no difference in the work area size (32.25" x 32.25") between the X-35 Woodworker and X-50 Woodworker. The upgrade is in the axis motors and the size of the rails (see here).
The display can be done without IF you have a laptop available to connect with the machine. Dust collection is a must. The joystick is a convenience, anything you can do with the joystick you can do with the controller (albeit not as quickly). You can test drive the VCarve software to decide whether it is worth it for you.