I think that what Ralph is saying is that doubling power into 4 ohms is only necessary if you drive the amp to its full output.
If your amp puts out 150 watts into 8 ohms and 200 into 4 ohms, it will drive your speakers just fine if you only need 100 watts into the 4 ohm frequencies to drive them as loud as you want to listen to them.
Is that right, @atmasphere ?
Playing your speakers (and most speakers) with 100 watts into 4 ohms would be really loud. I think any of the amps you're looking at will drive your speakers satisfactorily. So, as Ralph said, try to listen to the amps and pick the one that sounds the best to you.
If your amp puts out 150 watts into 8 ohms and 200 into 4 ohms, it will drive your speakers just fine if you only need 100 watts into the 4 ohm frequencies to drive them as loud as you want to listen to them.
Is that right, @atmasphere ?
Playing your speakers (and most speakers) with 100 watts into 4 ohms would be really loud. I think any of the amps you're looking at will drive your speakers satisfactorily. So, as Ralph said, try to listen to the amps and pick the one that sounds the best to you.