My 3000's VGA port has worked fine on both a CRT and an LCD monitors. I've had a bit of a warm-up problem. The video isn't stable until the system is warmed up. Works well enough so I haven't bothered to fix it.
I've got an Indivision in my A4000 and it's great! Much better than the internal ScanMagic it replaced.
I'd go with the built-in VGA on the 3000 if it's working. If not, I'd likely get the ECS Indivision over an older display card. Guess I've been burned by too many bad EBay deals!
Bob