I just looked at those Spires, wow some nice speakers! I am jealous! But, they look to me like they can handle far more than 100 watts? But the Korato's are some beefy amps, and with 30 watts of Class A power they could sound sweet. But they are made in Yugoslavia, if you have a problem, you may find yourself on your own. Maybe a nice used Pass Labs X150 would be nice? Or 250 for that matter? You've got a nice system! Good luck filling the amp spot.