My thoughts on a few of the ones on the list:
Sultan's Donair (Coquitlam, off Landsdowne) - tried twice, both times "meh". Meat is flavourful but its offset by really terrible pita, chintzy on the vegetables, and somewhat poor service.
Mega Donair (Port Moody, up Snake Hill) - as others have said, the best part is the pita. The meat is nothing particularly special and I found their sauces to be less flavourful than most of their competitors.
Donair Town (Port Moody, St Johns St) - this is my overall favourite so far. The pita is not fresh made like Mega but is a much better quality premade one. Meat tastes great and they have solid portions - I really like their garlic sauce as well.
Donair Town (Coquitlam, near North Road & Como Lake) - not bad, just not worth driving further than the other options for me (I live in PoMo). Very generous on the sauces, but somehow they don't seem to have the same flavour as the PoMo shop. One thing I appreciate is they are open way longer hours than several of the other options.
Here are some photos of what I REALLY miss and wish I could duplicate, the best Turkish durum from when I was in Istanbul with fresh veg, incredible meat, and a fresh home made wrapper:
Mark