Hello, I have owned a number of pairs of Apogee's including the 1 ohm Scintilla (two pairs-I must have been on crack). Anyway I think one of the finest amps built to run the Apogee load and still sound musical is the Coda System 100. It was pricey but can be found on the used market from time to time. There is a Coda 10 on the gon right now that I found to sound good with the Scintillas and Duetta II's also. He only wants $750.
As far as tube amps you may consider a pair of Quicksilver Silver 90's. They had 1 ohm and 4 ohm taps for ugly loads. Those amps can be found for around a grand. Most other tube amps are optimized for 5 to 8 ohms. I think VTL is 5 ohms. Anyway, I hope this helps.
As far as tube amps you may consider a pair of Quicksilver Silver 90's. They had 1 ohm and 4 ohm taps for ugly loads. Those amps can be found for around a grand. Most other tube amps are optimized for 5 to 8 ohms. I think VTL is 5 ohms. Anyway, I hope this helps.