Zenblaster, I quote from the independent test on the CJ 2500 carried out by Stereophile:
"While the Conrad-Johnson MF2500 will drive 4 ohm loads with music, the output specification is given as 240Wpc (23.8dB/W) for 20Hz20kHz, at less than 1% of IM or harmonic distortion, both channels driven into 8 ohms. Don't be concerned at that high-looking figure of 1% distortionin practice, the figures are much less than this. What this figure reflects is C-J's disdain of slavish conformance to the artificially low distortion figures adopted by many companies without regard to sound quality."
I haven't seen the test for the CJ 2250 the OP is considering but knowing the quality of CJ amps I wouldn't be concerned about specs.
"While the Conrad-Johnson MF2500 will drive 4 ohm loads with music, the output specification is given as 240Wpc (23.8dB/W) for 20Hz20kHz, at less than 1% of IM or harmonic distortion, both channels driven into 8 ohms. Don't be concerned at that high-looking figure of 1% distortionin practice, the figures are much less than this. What this figure reflects is C-J's disdain of slavish conformance to the artificially low distortion figures adopted by many companies without regard to sound quality."
I haven't seen the test for the CJ 2250 the OP is considering but knowing the quality of CJ amps I wouldn't be concerned about specs.