Thanks for reviewing this amp, I've been curious about it since its release. Wondering if when you compared it with the H10 was that with the 49860's or 49710HA's? Could you describe the SQ differences you found between the two amps when running the HPA-3B fully-balanced? I currently use a H10 with the stock opamps swapped for AD797's and 49720's but I'm looking to upgrade to a fully-balanced amp around $600 mark (but not Liquid Carbon as it will cost more like $850 in Canada). Cheers!