I would concentrate more on the wiring right now. As long as you do that well you can set up different systems as the need arises. Put it in a rack that has room for more device later, with ventilation.

For better configuration abilities you need better hardware. If you dont need to set up different vlans or networks you dont need the expensive stuff.

If you decide you need more options you can upgrade the hardware later. Just make sure you get hardware that supports gigabit speeds or better.