I have not used either, however, I do have the Revel Studios, and am using similar quality equipment.
I used to use a Levinson No. 27 (100W/ch), and then upgraded to the Levinson No. 23 (200W/ch). The smaller amp seemed to drive it acceptably, however, I do notice that it seems just a bit sweeter with the bigger amp. (It seems to fill the room a bit better, although I do have a decent sized room - 16'x24'). I am not sure I would go down as fair as 75W/ch. I think that might really be stretching the limits of the amp.
Good luck in finding the amp you like.
I used to use a Levinson No. 27 (100W/ch), and then upgraded to the Levinson No. 23 (200W/ch). The smaller amp seemed to drive it acceptably, however, I do notice that it seems just a bit sweeter with the bigger amp. (It seems to fill the room a bit better, although I do have a decent sized room - 16'x24'). I am not sure I would go down as fair as 75W/ch. I think that might really be stretching the limits of the amp.
Good luck in finding the amp you like.