Our company is an LLC (set up on the Secretary of State website for $150) but we elected to be taxed as an S-Corporation by filling out and submitting the FREE Form 2553 obtained from the IRS website. We had this set up 8 years ago and have not had any problems/issues since. I'm sure you can do the same for a C-Corp.
Is it a real hurdle to transfer an LLC to a C-corp?