Wow, those are pretty, H! I like his stuff

Soooooooo - I've lit a pile of money on fire "vetting" painters, so you don't have to lose any of yours

I'll break this up so it's not one gigantic post.
Avoid:WonderCat ( France ): it pains me to steer people away from them as they are the nicest people on the planet, but they are too expensive for what you get ( 200 pounds for a KDM 32mm figure! ), they're too slow and they don't package the miniatures well ( so definitely don't send them resin as you'll get a pile of pieces shipped backed to you ).
Toad Painting ( Canada ): He's good, but bad business. He upped the prices on my AFTER he painted some, I called him out on it and he discounted, but I had him return the rest - he went 6 months no communication and no work - anyways, he doesn't really have a "studio", just some kid who likes to paint miniatures competitively and put up a website to make him look like a pro. Not good enough, dog slow and jacked at business.
Iron Keep Studio ( Poland ): This guy is awesome, great prices with great freehand, but he's very slow. If you don't mind the wait, he's gold. But since there are other people out there who do the work, I say don't bother with Gregor here. That said, his work for me was fucking awesome and priced right.
Shoshie's Magnificent Painting ( USA ): Shoshie is awesome, but I'm not using her any more. She's expensive ( $200 for typical 32mm resin ) and exceptional and she works ( so you're not waiting ). That said, I don't think she has a great eye for color. My man in Poland charges a lot less, he's not "technically" as good as Shoshie, but I love his work and he's a true artist with color. So do you want technically strong, more realistic looking work and have the money, then go with Shoshie. If you want something more "art", than save some money and go with an Eastern European painter who'll make your miniatures look fucked up ( good! ).
The Spiraling Cadaver ( USA ) - good painter, good prices, but you have to like his style - everything is OSL, just not my thing. But he is popular and doesn't charge much ( OSL is fast to do ), so if you dig that look, he's a find.
Duff Paint ( UK ): He's a master and his prices are very good ( about $80 for 32mm ), but he's dog slow. I sent him some more since his first batch to me was so good and reasonably priced, but he's had the second batch for 6 months and hasn't even started. Fuck.
Ringil ( Russia ): The best painter I've used to date, she is a jedi of miniature painting, but expensive and slow ( she's not really a commission painter, I had to talk her into it ). Took her a year to paint 17 miniatures, but wow, they're good - much better than Soshie, but about as expensive.
Red Piano ( USA ): Kenny is a find, exceptional work for reasonable prices, but he's stopping now to work on other stuff.