@asmithkash +1
"I will have this amp for 30 years."
sure beats churning and chasing...
and yes good amps can and should last that long. (I have an Onkyo Integra from 1986 that still kicks butt, and a Pioneer Elite from 1999 that is deep, powerful, and gorgeous... so unless there's something faulty, your Krell ought do a great job for a long time, indeed decades.)
if you do, however, happen to feel like trying new speakers, consider Concept 50, by Q Acoustics.
Personally, I don't like "bright" speakers, though I haven't heard your particular set... But, I understand holding on to beloved speakers, as with only small update I've held on to my Epi 100 speakers for over 40 years due to their smooth clear rich balanced sound. I also have other speakers now, too, but the Epi still due their duties in the room they're in.