Those butterflies are beautiful. It would be best to look for an artist with experience in hyper-realism. If you'd want to stop by some of your local tattoo shops, that's what you'd want to ask for. You're looking for someone who can do photo-quality tattoos but with an emphasis on saturation and vibrant colors. The 3-d look is actually not as challenging as getting the colors themselves to "pop" of of the skin.
I see that you're in Montreal. You may want to check out the work of Lisa Dowling in Ontario. Absolutely amazing. I have no doubt that she could get the effect you're looking for.
If you don't mind travling, I would highly recommend:
Bill Vegas in New York
Nikko Hurtado in Hezperia, California
Mike DeVries in Northridge, California
... and about two dozen more, but if I start rattling off names it would be overkill.
Whatever you do, don't give in to the temptation to think that a tattoo artist must be the best if they have a show on TV. A television show simply means that they are leveraging the media for commercial appeal... being popular doesn't mean you're the best at what you do.
Honestly, you'll be able to find a handful of extremely talented tattoo artists in virtually every major city in the US, Canada, and most countries in Europe. Gone are the days when tattooist were just guys who happened to draw "sort of ok." These days, tattoo artisis are often graduates of art school, or at the very least go through a rigorous apprenticeship where they really have to show exceptional skill to stand out from the crowd. In fact, there are so many great artists out there that it's actually just as important (if not more important) to find one who you can feel comfortable with personality-wise. The artist needs to be able to respect the customer enough to have an in-depth discussion about exactly what you want on your own body. If they treat you like you're just the next one in line and that your artistic wishes aren't that important, do you think you'll be satisfied with the art that will be on your skin for the rest of your life? Sure, some people are OK with half-assed art on their body, but it seems to me that you are looking for something that is tasteful and makes an important statement about your inner self, so look for an artist who agrees with you on that.
Oh, and just to clarify, yes I am a tattoo artist.