I'd be happy to see it equipped with a 6" display, that is my ideal size.
5.7 will make it hard to decide since I already have a Galaxy S4. In addition having my Nexus 7.2 to compare, it's this first hand experience that has helped me to determine 6" as the right size for me. Even if that means it's a bit larger than the Note 2, that's no problem. I will buy one without hesitation.
Only time will tell.