Personally, having flown only on 773 and 772 on QR, 773 on SQ, 773 on EK, A333 on LH, A333, A340 on CX, all on economy, I think 772 on QR is the best. The economy cabin has lesser economy seats than other 773 and this gives a more spacious feel. Each section is not that crowded compared to B773. I preferred B777 range over A330 and A340 anytime. I think ANA on B787 is a nice product. Might travel on that to Japan next year. Looking at the stats of QR 787, it's kinda disappointing when they cramped too many economy class seats. I am slim but tall at 1.83m, always enjoy the 34" seat pitch on 773 and 772. Hopefully the QR product will be good in B787. Would they launch it on Singapore-Doha route?