I'll try to address the last part of your question.
"Will I have to be very careful about over powering these speaker or should I be ok with this power."
A lot of people have a misunderstanding that amplifiers send power to the speakers when, in fact, the speakers draw power from the amplifier. When an amplifier has the potential of supplying more power than the speakers can handle there is potential that you could turn the volume up loud enough for the speaker to draw more power than it can handle, but it isn't likely unless you're looking to replicate rock concert volumes. More than once I've heard Focal 806v speaker hooked to Krell monoblocks capable of supplying 300 or 400 wpc at 8 ohms and even when they were turned up louder than I would ever choose to listen there were no issues. It is my understanding that more speakers are damaged from an amplifier not having enough power than from being overpowered.
I don't think that having more power will necessarily improve your perceived bass response. But having said that, any amplifier that doubles the power from 8 ohms to 4 ohms should eliminate any concerns about the amplifier being the issue. It appears that you're talking complete apples and oranges with the two amplifiers.
"Will I have to be very careful about over powering these speaker or should I be ok with this power."
A lot of people have a misunderstanding that amplifiers send power to the speakers when, in fact, the speakers draw power from the amplifier. When an amplifier has the potential of supplying more power than the speakers can handle there is potential that you could turn the volume up loud enough for the speaker to draw more power than it can handle, but it isn't likely unless you're looking to replicate rock concert volumes. More than once I've heard Focal 806v speaker hooked to Krell monoblocks capable of supplying 300 or 400 wpc at 8 ohms and even when they were turned up louder than I would ever choose to listen there were no issues. It is my understanding that more speakers are damaged from an amplifier not having enough power than from being overpowered.
I don't think that having more power will necessarily improve your perceived bass response. But having said that, any amplifier that doubles the power from 8 ohms to 4 ohms should eliminate any concerns about the amplifier being the issue. It appears that you're talking complete apples and oranges with the two amplifiers.