That looks absolutely amazing. It looks like it belongs in a space museum. Is there ever any concern of the solar arrays just buckling to themselves from being so large?
I like the 40k background and love the game but the writers don't advance the story coherently and sometimes just blatantly disregard old fluff ie: new charasmatic necron overlords.
If it's tasteful, then yes. I've seen some of the titans and tanks running around here and they look awesome. The level of detail that can be put into a paper model really sells it. For more organic things such as infantry and giant beasts I think plastic/lead looks nicer still.