I am skeptical that "looks pretty" drives conversions. I think customers pretty much don't care, based on "ugly" versions winning in many, many of my tests. Remember: the customer doesn't get to see the pretty alternative laid out side by side with the ugly alternative.
Example: form submit buttons in your Internet browser of choice look fairly pretty, right? (Or at least comfortingly familiar.) I would not describe http://www.bingocardcreator.com/images/bcc.net/next-step.png as pretty -- it is what I could throw together in ten minutes. But it clocks "pretty" buttons with the same text on it.
You're welcome to try it yourself if you think pixel-perfect alignment will make a difference. Please post results.