Amp for subs

I have a pair of Kinergetics Research SW800 subs and crossover being used with Martin Logan CLSIIZs. I have access to an older but recently rebuilt Bryston 4B or a Parasound A21 to drive the subs. Both are great amps but does anyone have experience with either driving large subs? Thanks
Have you considered bringing them up to date with a Class D amp with built in crossover/eq capabilities?


They will work but the Dayton SA1000 is really the way to go.