Cantona... I just had 400 (they underestimated and it actually came out to 491 hehe!) transplanted to my head by Dr. Cooley...
Just on the temples to fill it in. My reasoning?: I'm 23, fuck it, I'd rather look good during the best years of my life, and shitty during my old ones, instead of just "meh" the whole way through.
So if you wanna think along that line of reasoning, I say go for it.
The way you style your hair in the 1st/2nd pic makes your hair look real thick as is... But If you want to feel better when you swim or pull your hair back, I say get it done man.