Yeah, I think if you get a Korean written tattoo, any Korean will find it interesting. And personally, I am more into 대박 because if you say only 드문, that doesn't say anything much. 드문 is an adjective and it's not usually used alone. But, 대박 means so many things and fits in so many situations.. kk So, I vote for 대박!!!!!!

how do you say 진귀... like the pronunciation/romanji?? thank you

I personally do not agree with a word "대박" to be chosen for Korean script tattoo just because it sounds so mediocre and it doesn't sound cool enough. it also expressing the meaning of damn good fortune or striking of good luck kind of meaning which isn't right to be discreet The tattoo to be. if you like to the meaning of rare, there's one you can consider such as "진귀" which you can use as a noun. it means, preciousness, valuableness and priceless. it sounds rather chic and cool to me. what do you think? consider carefully cos it will be permanent thus, it needed to be careful otherwise, regret later. good luck!