Yes, LaTeX-to-HTML converters used to suck (you've probably tried LaTeX2HTML), but of late they've got better. Tex4ht is highly configurable, and produces nice XHTML+CSS. See also other converters.
You can also use Docbook, if you can bear to write in it. There are converters from DocBook to both HTML and LaTeX (or to PDF directly); an example of the latter is dblatex.
See this post: LaTeX vs Docbook.
