"I like Ovation Pro (Demo) that I see will import Impression Pub, does E/TechWriter do this?"
You can import the textual content, with effects, etc. from Impression documents, using the 'Save with Styles' option in Impression. This retains most of the textual formatting, and you can then export any images manually. It's not quite as easy as dragging in an Impression file, but it works well. I recently did this with quite a large document, and was pleased with the result: once the document was 'converted' into EasiWriter format, I was then able to 'Save as HTML' (which works impressively). And it's useful to have support for DDF for a host of other reasons too.