krell FPB300 or jeff rowland model 7


i have a pair of Hales concert five speaker, i plan to buy a used poweramp, Jeff rowland model 7 or Krell FPB300
tongpoh
model 7 mk3 and 8Ti both on sales, model 7 mk3 USD5800, 8Ti USD8300, which one better? i thinking maybe model7 mk3 too old, but how is the performance compare with this 2 amps?
I cannot say for sure, but I would suspect that the Model 9 would be the natural competitor for the 7, not the Model 8. The Model 7 holds its own with the Jadis JA-500 in micro dynamics and shear music believability.
when i decided to buy a used jeff rowland 8Ti, another guy offer Plinius SA250 MK IV, it USD1,800 cheaper than jeff rowland, which one too choose?