Great thread. I've seen 3 out of the four and your reviews of them sound very accurate to my own experience.
I would give Linda at Hawaii Health Spa a try too. Not a looker, but her massage and blowjob skills are some of the best. Lynn from eSpa is also a great choice very similar to Nadia except I find Lynn has more technique, is more personable, and is more receiving of instructions. There is also Cici at Spa Times on Friday in Scarborough. For me her mouth is small, but she will deepthroat you while you're cumming and at the same time she'll audibly gulp your cum down her throat