Yes, but should be worth it (hopefully) for me. If nothing else, it will provide a bit of factual evaluation of several products in one location and on the same dish/cable configuration.
I hope so too. Not holding by breath but it is certainly worth a try. My invacom is about 3 years old now (I think) and I know that they can deteriorate over time. It is also true that from a boxload of LNB's you can pick best and not so best in terms of performance, luck of the draw I guess. When you say 5% improvement - what was it a measurement of?
The DRX890 will go into our apartment to replace the crap receiver I have down there (was fine for 1n - but then again, wasn't most of them?

).
My other thought (a Technomate) is being pursued in another post (
http://www.satellites.co.uk/forums/threads/technomate-tm-5402-hd-m2-vs-tm-5502-hd-ci.160839/). If I do get one (assuming again that it has no advantage over the Humax) it will head for my cinema room - the 4th and final destination from my quad LNB.