I still think you might get by using SED Winged "C" EL34's.
They are the most rich,and musical modern EL34's I have tried. New Sensor's choice of EL34's are sort of laid back sounding in comparison to the SED's. Then if not,try the sub option.The deal with the cables might not have much any affect to amount anything by the way you had then hooked up,unless they have a lot of capacitance and inductance in them.Then they may have some crossover affect. Their link doesn't say much about them.
They are the most rich,and musical modern EL34's I have tried. New Sensor's choice of EL34's are sort of laid back sounding in comparison to the SED's. Then if not,try the sub option.The deal with the cables might not have much any affect to amount anything by the way you had then hooked up,unless they have a lot of capacitance and inductance in them.Then they may have some crossover affect. Their link doesn't say much about them.