Not exactly. It's
1. Transfer files from CF card to HDD, import into Aperture as referenced files for triage (separate library, delete rejects and move to system trash, delete keepers and leave in place, triage library stays empty)
2. Open in DxO, process to JPG and export sidecars
3. Import RAWs in to Aperture as referenced files, import JPGs into Aperture as stored within Aperture
4. Backup RAW files to HDDs in two locations (work and home), then tag CF card as ready to format and use
Probably sound convoluted, but it works for me. Aperture is better for triage (images load faster, loupe tool, easy multi-shot comparisons, etc.). DxO is a better RAW converter, with better lens corrections (better than LR, too, IMO). Aperture allows management of multiple libraries, including on external drives.
The reason for separate RAW and JPG libraries is that my primary computer for editing is a 17" MacBook Pro with a 500 GB HDD (I also have a 13" MacBook Air with a smaller SSD). At some point, that HDD will fill up, and at that point, I can simply move my RAW library to a (third) external HDD, and keep JPGs and a year's worth of RAWs on the laptop.