Help me choose Parasound or McCormack

I have a parasound p3 which I think is great. I just bought a mccormack sst1 and dac combo. I'm looking for a good 2 channel ss amp that can be had for less than $800. I'm leaning towards the Parasound Halo a23(~500) or a McCormack dna 0.5(~650).

Thanks.