The company structure can matter a lot. IANAL, but my understanding is that an LLC is not an appropriate choice for a company that hopes to be acquired or issue an IPO.
So don't obsess over it, but be sure you have competent advisers including an attorney who can help you make the right choice in such matters.
I don't know about US, but here in India, you can re-incorporate. I don't see how that can be an issue - operate as a LLC(if you have reasons to) - re-incorporate later when you are becoming a potential acquisition target. I don't think whoever is going to acquire you will decide not to just because you are going to re-incorporate.
In the US, you can form a corporation and then merge your LLC into it, thus tranforming your LLC into a corp. So yeah, it may lead to extra work down the road, but it's not a life-or-death decision at the beginning.
So don't obsess over it, but be sure you have competent advisers including an attorney who can help you make the right choice in such matters.