Oh boy...
Please be aware that when it comes to router bits, you get what you pay for. Cheap bits are cheap for a reason. Do you want to take a chance with sharp carbide spinning at 18,000 rpm or faster?
The list above is a good starter set:
-Slot cutter assembly: 1/16" Kerf slot cutter, arbor assembly, and bearing - bought in 3 separate pcs or sold complete
-Flush Trim Bit - get a 2-flute, carbide tipped flush trim bit with 1/4" shank, 1/2" Diameter, and 1" Cut edge length, bottom ball bearing.
-Straight Plunge - get a 2-flute, carbide-tipped bit with 1/4" shank, 1/2" Diameter, and 1" cut edge length
Those 3 bits will do most of the operations you'd need to do when building an arcade cab.