I think you might to run into ergonomics issues with the controls recessed inside the table like that. It's going to be difficult for some people to comfortably fit hands into that space, especially with that coin slot(?) on the right. I'd suggest opening up the recessed portion with wider angles to either side of the controls, and moving that coin slot.
Also, a sketchup tip; you can import already-modeled arcade controls, monitors, and probably even coin slots, from the 3D Warehouse. there are quite a few options out there, and that'll help give you a better sense of scale than trying to model the controls yourself. There's even a couple of Dreamcast models out there, now that I look at it...