Should i replace my MC255 macintosh 5 channel amp?

Seems a very nice amp only used for center and mains as part of stereo and ht. Maybe its ok, but hard to find much enthusiasm for this amp and other mac amps.
Have b&w 802 d3 speakers, lumin x1 dac/streamer, schiit freya preamp, nucleus and a NAD M17 v2i processor. Mc255 amp connects to mains and center with transparent super cables and xlrs for all the interconnects. A simple clean system.