The ArcadeVGA can only output native 15KHz refresh rates to an arcade monitor like you would find in a real arcade machine.
If you want to go the alternate route with GroovyMAME, CRT_EmuDriver (modified video drivers), and a supported ATI/AMD video card, you still need an arcade monitor.
I've used both setups with my arcade monitor and both have their pluses and minuses. ArcadeVGA is way more plug-and-play and easier to get up and running, but it is more limited because of the built in resolution list. The GroovyMAME/CRT_EmuDriver route is way more configurable and I personally think it gives better results in a lot of cases, but it can be a pain in the ass to get set up and working correctly.
My personal MAME arcade cabinet setup:
Intel Pentium G3258 3.2GHz (overclocked to 4.5GHz)
8GB DDR3 1600 memory
AMD Radeon HD 7750 video card
Windows 7 Home Premium x64 SP1
GroovyMAME 0.171
CRT_EmuDriver 2.0
Hantarex Polo 25 arcade monitor (15KHz only)
JPAC (to interface the PC with my cabinet's JAMMA harness)
Note that the JPAC protects my arcade monitor from out-of-range signals while the PC boots into Windows (before the drivers kick in).
The best source of information on running MAME with native resolutions on an arcade monitor is the forums arcadecontrols.com unfortunately, the site just went tits-up a few days ago and it's slowly coming back on-line.
The developer of GroovyMAME/CRT_EmuDriver has forums here as well...
http://geedorah.com/eiusdemmodi/forum/
I should also note that there are LCD monitors on the market with variable refresh rates that are marketed under the G-Sync and FreeSync brand names, but I don't know exactly how variable they are and how well they work with native arcade resolutions and refresh rates. Maybe someone with more knowledge in this area can chime in.
GroovyMAME support forum on BYOAC
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Re: needing some ArcadeVGA + Mame setup clarification
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