Well you realize you have to give a sonic summation of each one, right?
Lol yes, will do, but for now I will volley them on a case by case basis in the meantime.
BHK 300 versus Hegel H30
Tough one, as I like them both but for different reasons.
Hegel H30 is a Beast of an amp as Mike Tyson was as a boxer. The H30 delivers a punch with authority that can drive most any speaker on the planet. The first thing that comes to mind is the BASS and its grip and control as well as its in your face front row sound. Mids where clear but i felt that it lacked a bit in the upper mid bass and highs where smooth and not brittle. The H30 plays well with a lot of different speakers and loves rock and metal and Techno. The mids are are a bit forward with great imaging and but suffers a bit with its narrow sound stage. I
BHK 300 is amazing and more like Mohamed Ali with substantial power yet more of a dance that is musical and more involving. The sound signature lends itself to a more euphoric and holographic sound as apposed to an in your face forward sound. Bass is totally there with the innate ability to deliver punch and gradients with in the lower spectrum. Mids are superb and lushes with great detail more to the Musical side rather than analytical. The highs are superb and natural with a clean and clear sound and not in any sense harsh, piercing. or brittle.
I must say that is one of my favorite mainly because its a hybrid, with the best of both worlds, Muscle, Force and Bass of the Class A/B world and the Finesse and Lushes Organic musicality in the mids and highs from the Tube world. The BHK 300 will play well in most all types of music both instrumental and voice.
Sorry to go off on a tangent with the BHK but it had very similar characteristics to the Block Audio Monos my #1 pick from the list.
Cheers!