We have exactly the same trip coming soon, also booked on the recent sale.
By the time I made the booking most of the seats were occupied already (I guess we were not the only one thinking $900 for F is a bargain) so I had to call EK to release 3E/3F.
While I prefer a window seat, so have never flown in the middle block on EK in the A380, I can't imagine that you would have a problem with any of their seats.
Have just completed a DXB-MEL flight (in 2A) and it was brilliant. I didn't count the number of staff in the F cabin but at times it seemed as if they must number 1:1 with the pax. I used the call button twice and had no sooner looked up to check that the call had registered, when there was someone at my side, smiling and asking how they could help.
The food was excellent, with the added benefit of offering any dish on the menu, in any category, at any time that you choose. Bonus points to EK for that degree of flexibility.
Then, of course, the showers. What could be better towards the end of a long haul flight than a hot shower, in a beautifully appointed room, complete with heated floor, bath sheet, a choice of spa products - and orchids in the shower stall?
Drat! I forgot to take a glass of the Dom Perignon 2004 into the shower with me!
Forget choosing seats. Can someone take up the DP-in-the-shower challenge?