My take is this:
Dolmar 6400-7900 is the same chassis and is essentially an 80cc saw. the 6400 has wonderful torque (which Hp specks don't capture). Buy a 6400 right and make it a ported 7900 when you're able.
I love my 372 and its not going anywhere. That said, after running another member's ported 10mm 044, I realized that IT was the saw I was looking for when I bought my 372.I could do without the 372's shrill whistle of the air injection. Ehh.
The MS461 looks and feels nice in my hands. I have not run one, but some people that I know (and know their proclivities) like them and that has my attention.
I like the power of the 576xpAT but not the feel. If I was leaning towards a 576, I would just opt for a 390xp and have a better handling saw AND more power for not much more money.
I like the AV of the 441, but not the weight of handling. Here the 365/044/440/372xp shine. IMHO the 461 doesn't feel much if any heavier then the 441 and it has a better balance with a 28" bar not to mention power.
The Echo CS-800p looks nice and well built but looks pretty slow compared to the German and Swedish competition.
If you have a chance, find a few of these prospects give them a feel. Run them if you can. Some saws feel a lot different in use than static. Similar to how heavy a Harley Electra-glide feels sitting still, vs how light it feels once you get rolling.