As the old McIntosh speakers had all cracked from old age, yesterday I installed Morel Virtus 6's in the front of the Legacy and Coax Pulses in the back. I was worried that they'd change the sound signature to something I didn't like, but I am pretty pleased with the result. They have more power at high volumes, and the treble is particularly good, although a bit of subtlety appears to have been lost at low volumes. Imaging seems to be more centre-focused than previously, in that I think the stereo imaging was previously slightly better, but overall at least I can blast stuff at high volumes without hearing the "tsss tsss" of the cracked speakers.