I would imagine the older and newer monitor speakers should match fine, since really there is only cosmetic changes (and a couple drive orientations). As Alan said, it's probably a good idea to get the bigger 25C, but either one will match fine.
Samsung PN60F5300 | Denon DBP-1611 | Roku 3
Denon AVR-1713 | EMP E55Ti | EMP E56Ci | EMP E5Bi | BIC F-12
Topping TP23 | NHT SuperZero 2.0 | Velodyne DEQ-8R