Time for a Pre change? Need the wisdom...

I bought a mac C 41preamp and a pair of AA 10T’s. 

There is a harsh edge riding on the high end... I cant get rid of it.  I have changed everything out and still cant remove it...... I have the opportunity to buy a Parasound A21 and a P6....  What’s the feeling here on this era of Mac? I have had people I respect and in the business prefer the Parasound over the Mac. 

Is the Mac on the bright side and is the P6 in the same ballpark. I have emailed AA about the harshness... maybe xover or maybe bad tweets? It’s killing me. I feel if I clean house (amp- pre) with new equipment I will have a better chance at getting to the relaxing listening days again.

All opinions are welcome... I have a thick skin as I know everything... lol