Agreewith SFO777, EK 777 in J is awful. However, the A380 upstairs has a signifcant advantage of the lounge (i.e. bar) at the rear for J&F, allowing you to get our of your seat and walk around in comfort. F has great shower room but the water ornament at the front hardly constitutes a rest area! The seats on A380 are also much better than 777. At a lower price and with limos included, the choice to me is around flying time.
I was also impressed with the redemption for EK reward seats. Be mindful now that some routes will be QF operated planes - an absolute no for me personally.