buildable

Hi. I am a newbie Drupaler– about 8 months of working with Drupal.
I am trying to find a simple theme to create a site for a potential client. They already have a designed HTML version and want pretty much everything to look the same. I imagined blocks that can be easily deswigned with html input.

Their products will be sold with a shopping cart. Any suggestions on a good theme and process? Thank you!