Advice for Pre Amp

Hi everyone.
I would need to decide between the followings two Pre Amps: Mcintosh C50 or Parasound Halo JC2BP.
Let's not take into account the price factor.

Another important thing is that the Amplifier is also Parasound (Halo A21). Maybe the Mcintosh C50 is better equipment than the BC2BP but since the power is also Parasound, I am not sure if this Parasound team (A21+ JC2BP) is better than the A21 + C50 team.

I am driving a pair of Jamo R909.

Hope you can assist on this question.

Thanks!

Fernando