I would think, given the size and implied quality of the Dahlquists, that they would be a nice complement to the Paradigms from an SPL perspective.
There has been an emphasis on tweeter and midrange, ah, detail in speaker products since 1997, though, that you might find make the Dahlquist less than a perfect tonal match with the Paradigms. This is something I would listen carefully for and pay attention to during calibration.
In a case like this I think you would really benefit from some quality time with some reference tones and an SPL meter.