The easiest way is to buy a jamma cabinet (preferably with a 6-button sf2 configuration) and then buy a j-pac and arcadevga from
www.ultimarc.com. all you need to do is install the arcade vga into your motherboard, shove the computer in the cabinet and connect the j-pac to the jamma connector. I had a similar setup in my street fighter 2 CE cabinet in my garage.
I wanted to build my own cabinet myself, but my wood working skills are non-existent and I didn't have the power tools available. I did build a wooden control panel that used ps2 controller circuit boards hardwired into arcade joysticks and buttons but the overall construction is pretty rough. I eventually want to either purchase or build an old school ms-pacman sitdown/cocktail cabinet (it's my "holy grail" as far as arcade machines go).
Beware of this hobby, it can turn into an expensive one that takes up a lot of garage or home space (kinda like motorcycles). At one time I had a MAME machine/SF2CE cabinet, a karate champ, an original standup pacman, a TMNT and a 4-player X-MEN/NBA Jam cabinet. I've since downgraded to just two machines but I have a crap ton of JAMMA boards stored in my parents old garage.
If you want more information check out
www.arcadecontrols.com. If you want to find out more information on arcade machines in general,
www.klov.com is also a good choice.
p.s. if you do want to use an old arcade cabinet instead of building your own, for the love of god, please don't use a vintage early-80's cab like the ms pacman, galaga, robotron, star wars etc... a lot of the early arcades had custom built and colored cabinets that were specifically made for them. it wasn't until the late 80's early 90's where you had generic cabinets that arcade operators used to swap boards in and out of all the time. it breaks my heart everytime I see an old pacman that was spray painted black and had extra holes drilled in the metal control panel to accommodate more buttons and joysticks. I know a few people that spend a lot of money trying to restore these old machines to their former glory. I did a partial restore for my own pacman cabinet... yes, i'm a nerd
