They're great 🙂
However, I'd be surprised if either would be an improvement sound quality-wise over your current setup - personally I'd be looking at better speakers before I did anything else.
Unless, of course, you're absolutely set on reducing your box count or are particularly enamoured with the streaming functionality available in those two - as an alternative, though, I'd consider losing the tuner and replacing it with a Squeezebox or similar, to give you Uniti/Neo functionality in your existing kit.
You could even replace your 8000cd with an 8200, which would give you a neat digital input for said Squeezebox...