My advice is to get a Commodore 1084S monitor. Commodore is not racist against Americans and does not ban then from using PAL mode. You can happily display NTSC or PAL and switch from one to the other as you wish.
Urm. 'American' isn't a race... I have a 1084S and an Indivision ECS. The Indivision is far superior to the 1084S. I suspect the AGA version is likewise better.