How expensive is the speaker? You may be happier if you spend the money on a non-powered monitor cabinet that was specifically designed to be accurate with the internal components already in the cabinet.
The speakers will set me back around £70 each, however ive known Celestion to reccomend this speaker to people who are using the AXE FX. Could you please explain a bit more about the non-powered monitor cabinet part? this could well be a better option.