I'd stick with the 3000's scandoubler myself, it performs very well. If money is no object, though, and you're not planning to use an RTG board, the Indivision will give the added benefit of HighGFX and possibly a bit more compatibility with LCDs, though the ECS Indivision adds a couple of its own output quality issues (ghosting is a pain.) It's supposed to fit in the 3000, but a mod or two are required (battery removal, maybe something else.)
