Denon x1200 to x3200w will support upto 5.2.2 ,the x4200 will support 7.2.2 /5.2.4 with an additional 2 channel amp.
x4200w will support auro 3d also only through a paid firmware upgrade.
Hi, after looking at all the options, i am finally considering onkyo 9700 htib. Though I am very apprehensive about onkyo receivers as many users have mentioned quality issues here.