How are Maggie 1.7's a "downsize" from Ohm 2000s? (Or did you mean you just moving from two pairs of speakers to one?)
I had a pair of Maggie 1.6QRs for several years and really liked them, but they are far more picky about the room and positioning than the Ohms. Maggies also have a very small sweet spot. I have a pair of Ohm 1000s these days that I really enjoy because of their enormous sweet spot and flexibility in terms of placement.
But, as noted by mapman, you are really talking apples and oranges in trying to compare the two.