Which IPL device Works Best?

I have medium-dark skin (maybe slightly lighter than a paper bag) and coarse black hair. Trying to decide between Ulike Air 10 (is there any difference between the 10 and the 4?)and braun 5. I've heard Silk'n is a great option for darker skin but it's not in my price range. I'm trying to target bikini/pubic hair the most because I despise shaving it. Also targeting my thighs because the area has an egregious amount of ingrowns I can't get rid of. I want to be smooth enough to be mistaken for a dolphin on a warm summer's eve. I'm scared of hyperpigmentation, also I do not care about how often I have to do it, whatever is fastest. HELP!