My Amp is good but probably the weak point

I would get a KRELL DUO 300XD over the CODA #8. I owned both the CODA #8 and KRELL DUO 175XD at the same time. I have sold both now. I may take the CODA #16 over the 300XD. Though I need more demo time on the #16. 

I like the top end on the KRELL XD amps more than the #8. Though the #16 is something else. So clean sounding.

The KRELL 175XD and the 300XD gear can be found used near your asking price. 

My next amp will be a CODA #16 or the most powerful a KRELL XD amp I can afford for KEF Blade 2 Meta (so I want power).

Keep the Khartago and give serious consideration to a speaker uograde. That is where you will hear the greatest improvement. The Heresy is frankly a dated design. No tears lost when I sold my pair. 

BTW I have a Khartago in my amp collection. IMO excellent sound quality! Not a weak link in your system.

Apparently you aren't familiar with the giant leap in amplifier technology in the last 2 years- GaN amps. I have a LSA Voyager 350, which is cool running and seamless from top to bottom. Anyone saying otherwise is probably not using quality cables, or some piece of kit upstream is the problem, cause my experience using various cables including; speaker, power cords, interconnects and digital cable is the changes are immediately heard. And MSRP is $3000, but typically it's on sale for ~ $2400

@gochurchgo

i will buy your weak point khartago and it can be the weak point in my system 😁

otoh i wouldn’t use your speakers if they were offered to me for free

just kidding (but not really...)