PSB Synchrony 1s were one of my favorites when I was auditioning a few years back. They are a little on the dark side though.
Coming from the Maggies you might feel like you lost something in detail while gaining much in mid range, bass.
I used to own the MMGs and currently have the 1.7s so while I never did an AB; i have done a fair amount of listening on both.
Philaharmonics are a great speaker line with really classy drivers, and a good design team... can't go wrong if u have the space and no WAF issues to deal with.