I'm glad you might have possibly saved yourself from down-graditis.
The 705 has the superior MultEQ XT, whereas the 40.2 only has MultEQ.
OTOH, it's possible the 40.2 might* last longer, it gives you DSX, and perhaps some other media goodies.
For me though, I choose 705 for the XT. After the xx5 generation (their first with HDMI), they started saving the XT for higher models. You can no longer find it with the 8xx let alone the 7xx.
OK I had to look, forget the 808, it doesn't even come with the 1008. Keep the 705 until it either dies, or you can get XT32.
Then again if you don't care about Audyssey, I just wasted my time.