I had a pair of Alon IV's for many years and I was driving them with an Aragon 4004 Dual Mono Amp and a VTL Super Deluxe preamp with great success. The Alon V's go down to 4 ohms and like lots of power to get the best out of them. I would suggest a powerful solid-state amp that doubles it's power down to 4 ohms, to be used in conjunction with your CJ premp. Perhaps a used Krell, Pass Labs, Simaudio, Edge, or Bel Canto Ref1000. These all have lots of power and will control the Alon's bass very well. It's difficult to recommend a particular brand, since I don't know your budget?
Rich
Rich