Jason GA said it best i think.

Even if there is a slight whiff of adult about your site chances are many mainstream webmasters / companies wont touch it.

Its best to go with a DBA or completely 'fresh' domain.

Remember though, if you do go for a fresh domain make sure you dont post any PR's to adult sites otherwise well, the whole thing will start happening again, i made that mistake a few months ago LOL

Regards,

Lee