Backgroundblur: Your JKDAC32 dac gives out 2.1v at less than 100ohms output impedance.
Your McCormack Power Drive DNA-1 power amplifier has 1.2v input sensitivity to make it give out it's full output of 150w into 8ohm, this combined with 100kohm it's input impedance makes it a really great match for a 10kohm passive preamp, which are 4 to 5 times cheaper than your budget and may even sound better.
Cheers George
Your McCormack Power Drive DNA-1 power amplifier has 1.2v input sensitivity to make it give out it's full output of 150w into 8ohm, this combined with 100kohm it's input impedance makes it a really great match for a 10kohm passive preamp, which are 4 to 5 times cheaper than your budget and may even sound better.
Cheers George