You might want to also specify which W3C Specifications that you're looking to meet (XHTML 1.0 strict, HTML 4.01, HTML 4.01 Transitional, etc.). The same goes for CSS (1.0, 2.0).

As stated above, you might want to consider your customer/client. Should this webpage be geared towards IE, Mozilla based browsers, Opera or all of them. There can be completely different 'quality' versions of HTML based simply on browser type.