Mi advice is sell the arcadevga 5000 and buy a second hand ati 5xxx. You might even get some extra money.
Yes and No. I recently bought a HD6570 from XFX. The card has VGA and DVI-I connectors. I discovered that the DVI-I connector only works in Digital Mode, meaning it should be a DVI-D connector (f**ing XFX!!). Why is this important? Because you cannot use two VGA outputs (one for CRT, one for VGA-31KHz monitor)
ArcadeVGA do have two real analog outputs, one VGA and one (real) DVI-I.
If you plan to use a second monitor, you have to be sure to use a digital one, OR be sure you get a two analog output card, which seems to be geeting difficult with modern cards.
My chances now: Using two cards, the 6570 for CRT-Emudriver, and the integrated card (Intel) for second monitor. I still have to try...