I have used S5es, which are the little brother to your 8es, quite succesfully with a VTL ST-150. The two make an excellent pairing.
I have also used them with a CJ MV60SE -- not quite as much power as you are contemplating, but oh my, what a marvelous combination.
I have also used them with a CJ MV60SE -- not quite as much power as you are contemplating, but oh my, what a marvelous combination.