i had an fpb-300 amp that
1. worked perfectly/looked great
2. threw a big 3d stage
3. sounded quite good, except that compared to a pass aleph amp, had a slight silvery top end, not unpleasant in any way, but wasn't as transparent as the pass. otoh, the pass amp had softer bass. also, the krell was $8k, the pass (1.2's)
were $14k. halcro's get out of the way even more, but lack "body", which i ultimately prefer.
1. worked perfectly/looked great
2. threw a big 3d stage
3. sounded quite good, except that compared to a pass aleph amp, had a slight silvery top end, not unpleasant in any way, but wasn't as transparent as the pass. otoh, the pass amp had softer bass. also, the krell was $8k, the pass (1.2's)
were $14k. halcro's get out of the way even more, but lack "body", which i ultimately prefer.