Hey Jeff,
it mainly depends on whether you want the table top to hold the machine with all protruding parts, or if you want the Onefinity Controller to sit on the table too.
You may be insterested in → this and → this.
Most people “forget” to take into account that the milling motor and the dust boot protrudes the bare machine dimensions towards front, which makes it difficult to retrofit a machine enclosure later. It can also be wise to take into account that you may retrofit other stepper motors later which can be much longer than the stock steppers (e.g. Standard Series Journeyman X stepper motor vs. Elite Series Closed Loop Stepper motors in Upgrade to Elite)