Experience with Moon by Simaudio amps & preamps

My system 

• McIntosh C2600 preamp and MC 302 stereo amplifier (replaced NAD C375BEE integrated amp)
• Rega P8 Turntable
• Moon by Simaudio 280D DAC (replaced Node 2i)
• Sonus faber Olympica Nova V (replaced Sonus faber Venere 3.0)

I listen to music a little loader than most - and I want more volume.

I enjoy the sound I have and recognize each system can sound different.  I've been impressed with Moon for the value and the cost.

My initial view point was explore upgrading to the MC 462 and also listen to the Moon 330A - with the intent of determining if buying Moon 400M (monoblock version of the 330A) would be an alternative to the MC 462.  

Anyone have experience with Moon amps and preamps?  

I was impressed with the Moon 330A straight up against the MC 462 

• I liked the improved details with delicate sounds in the mids and highs of the Moon.
• My concern is the potential for harshness from the Moon

I'm open to suggestions, my budget is ~$10k.  The value of the replaced equipment is not to be added to the budget - any value from a trade-in or sale after the fact gets will be reallocated elsewhere.

Thanks for your thoughts and consideration.