hi Bob, I already moved from Aperture to C1 version 8, I though I will move to Lightroom as C1 v. 7 was not good enough, now after trying v. 8 I moved because the software makes more sense than Lightroom ( I ve the training to know how it works = LuLa videos from v. 4 to 5, from Lightroom Queen, etc), I can do what ever I want from wherever I am, I can configure the look and tools the way I want, and the best of all, the rendering it is great, way better than lightroom. I will recommend you to try it and you will see.
Forget what people tell you, try it by yourself. C1 is not as great as Aperture, but it is way better than Lightroom.
Cheers,
Daniel