Aha, wait a minute - perhaps I hadn't thought my problem through all the way. I suppose I could set up your Quantity Discounts plugin and ALSO have the "Dual Pricing" module running, and they would work together?

In other words, the quantity discount would be set up across the board (everyone would see them), but via Dual Pricing I could give certain customers a different (i.e. lower) initial price upon which those discounts would be based?

I'll have to check if this will work for my client (to have the discount applied even to non-wholesale orders). Probably will, since consumer orders are unlikely to be high enough to qualify for a discount anyway.

Of course, if there's a solution where a whole separate set of prices (initial and quantity) could be set up to only appear for select customers, that would be ideal.

Thanks,
adam