It's usually cheaper and better in the long run to build your own cabinet, that's what I did.
I actually did two, a upright and a cocktail table version, the table cost about $70 USD to build (not counting computer and controls) and the upright cost about $90 USD to build, again not counting innards.
Most used arcade cabinets are being sold for alot more than that, and shipping is horrible, unless you have a truck and can buy locally.
If you can get a good deal on one they are usually beat to h***.
I never was able to find one that made me totally happy either, they all had some compromises, so by building my own I got exactly what I was looking for.
If you decide to build your own I can assure you that
It really isn't difficult to build one
you can do it with just a circular saw and some clamp guides, if you know anybody with a drill press or a table saw ask to use them, these tools are helpfull too.
I recommend 3/4 inch melamine to build your cabinet because I had good luck with it.
if you are careful with your money, you can have a cool cabinet for very little $$$