I have answered a few such threads as this and so here I go again. As many have already commented, if you want balanced, most of your list is not going to work. The BAT and the two Aesthetix models are the balanced units here.
Yes, the Io has many tubes but it does not run hot. Small signal tubes generate very little heat....even 16 of them. And the two EL34's in the PS are not a heat issue. If the Io Sig is too costly, then consider the Std Io.
Yes, the Io has many tubes but it does not run hot. Small signal tubes generate very little heat....even 16 of them. And the two EL34's in the PS are not a heat issue. If the Io Sig is too costly, then consider the Std Io.