Hi David,
I bought Aperture version 1 (yes I'm the one) and liked it.
It had it's shortfalls, but I liked it nonetheless and 1.5 is much better than 1.0 (no surprise here).
When I started using the eMotion, I was rather disapointed that I couldn't use Aperture with the eMotion files.
In the meantime I bought Lightroom, because it does what Aperture does but supports generic DNGs. I like it ok. But always there has been that nudging feeling that probably Aperture would be so much nicer to use than LR.
So I always looked for a way to bring eMotion files into Aperture.
Now that this is possible I will play a bit with Aperture and eMotion files and see how I like the quality. For my personal workflow demands both Aperture and LR are well suited but emotionally I lean to Aperture .
Whether Aperture will fullfill your quality and workflow demands, or whether LR would be a better choice or maybe PS and Bridge or RawDeveloper or whatever, I can't say.
I find changing your workflow is a major task and should be well thought out.
I'm sorry that I can't be of more help, you will have to try it out or ask somebody with a more misionary attitude.
Regards
SH