how about putting on a tank top, then looking at the skin that's covered by it - have someone take a pic of your back - and play around with the placement.
if it needs to go in the small of your back, it needs to go there and fvck anyone who thinks different
mine had to be on my shoulder - it was also part of a personal vow - and that was where it had to be once I'd thought about it. you'll be surprised how many people don't
ask you about your tattoo even if it's visible!
still, when people see it they'll put you in the "tattooed person" pigeonhole, and kick you out of the "untattooed person" pigeonhole. but that's OK
I understand the nonremovable ink thing. still, I'd recommend getting a test spot done first - allergic reactions really suck, and it ruins the artwork.