Of the companies I have ordered from, I like Fairyland the best. They don't have a very large selection at all and their dolls are very expensive. But they put a soft sheen of glitter on their faces and they pose like a dream! Here are others I have purchased:
Dollmore - My first and favorite doll is from Dollmore. He has such a beautiful face. But I can't pose him at all. My wife has restrung him for me about 5 times and she wired him, and he can only do two things: flop because he's too loose or slap himself because he's too tight. There's no happy medium. She got a female doll from Dollmore and doesn't have these problems, but my poor boy is a mess. Dollmore has the largest selection of clothing I've ever seen though, and they also work well for my Ringdoll dolls.
Ringdoll - I have bought two dolls from Ringdoll: Sol and Frankenstein. Their dolls are gorgeous but their craftsmanship is sloppy. Both dolls I ordered are all scraped up and powdery. They have resin crystals in their feet, like sand between their toes. And their heads are freakishly small; they are 1/3 dolls but they need size 7/8 wigs. I wasted a lot of money buying 8/9 size wigs that ended up being way, way too huge on them. They have pretty much no clothing selections, but fortunately Dollmore clothes fit them like they were made for them. They seem to be strung stiffly but they stand well even if their arms don't pose that great.
Iple House - The one doll I bought from them looks nothing like his picture. I purchased a 'natural skin' color and while I expected it to be peach or pink, he actually looks black. He's an Asian doll and I wanted him to look Korean, but he looks Filipino. They blushed his cheeks and chin IN ORANGE and I had to remove half his faceup because it looked atrocious. He's extremely heavy and bulky and their dolls in general are terrible to pose. My wife has one too and if you try to make them sit, their pants bust open! They're very pretty and expensive dolls but notoriously you can't do a thing with them.
I hope that was helpful..