Hi Frank,
You're welcome, and it is always a pleasure to suggest solutions to someone motivated like you are.
I agreed with you W2ePub is a nice extension and L. Calcinai did his best to make it even more effective. But from him I do prefer MyTXT cleaner (not related to ePub).
Now about Writer2xhtml from E. Just. I think it is also a nice extension that I use very often. However the last (beta) update is dated from March 2012 and a little rejuvenation would not be bad at all.
Between the 2, I prefer the ouput of AWP: globally I find the codes cleaner and the conversion process quicker. But as I said, AWP has its limits (no tables) and frankly can't be compared with such a big (and great) word processor on which Writer2xhtml is based.
I hope you'll continue to share your opinions here; it is important to do so.
@ Toxaris
I was kidding a bit about the "$13 for MS Word" (but not about my wish to visit one day the Netherlands)

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I also do not really like the ribbon in Word 2007 and 2010 I know a bit: this not intuitive to me and this is why I use AOpenOffice predominantly in conjunction to AWP.