Aperture and/or iPhoto ??

Question

After a recent photo shoot I realized that I finally needed to update my photography workflow.
Currently I import pictures from my Rebel XT directly into iPhoto 09, I then make an album out of those pictures, go through my selection process of rejecting the majority of pictures, and then do any post processing in PhotoShop CS3 with the pictures that made the cut. This approach works but I find it cumbersome importing the images from PhotoShop once I have made adjustments. Ideally I would do it all in one application, which prompted me to purchase Aperture 2, as iPhoto's editing options are not robust enough for my needs.
Tomorrow I will be installing Aperture and now I am left with the question of whether I should use Aperture as the application to manage my quickly growing picture library (currently around 10k) or if I should stick with iPhoto to handle the entire library and just use Aperture to do work on specific albums that post processing is required on.
Many pictures I have taken and will take will never require post processing (ie pictures from a point and shoot) but I want one place where I can at least view all of the pictures in my collection (from point and shoots as well as SLR's).
Should I keep iPhoto as my library organizer or should I let Aperture handle everything? What would/do you do??
Thank you in advance for any insight on this!

Answer 1

Everyones responses have been very insightful, thank you.
I previously did not want to dirty up my original question by bringing up iPhoto exclusive functionality such as Faces, Places, Facebook/Flckr/etc integration; but I am glad it has come up.
When the aforementioned iPhoto specific features were first announced, my initial reaction was that this new functionality would be inherited in the next version of Aperture, after a little thought though I am not so confident that will be the case.
The responses to my initial question were unanimous that I should switch to Aperture to be my sole picture library management solution, prompting me to draw the conclusion that Aperture is the pro version of iPhoto rather that an application that works in tandem with it. Is it then appropriate for me to draw the conclusion that the aforementioned iPhoto exclusive functionality is considered more "home" than "pro" and therefore would not be migrated up to Aperture?
I guess I am making this difficult because I wish to maintain one library containing "home"(point and shoot) and "pro" (SLR / post processing) pictures, without loosing the functionality appropriate for each category. I understand that a "home" user may never care about the editing tools available in Aperture and that a "pro" user may never care about tagging peoples faces, but I believe there is a category of user that will sometimes want to do both.
When it comes down to it, I do not believe the iPhoto exclusive features will be enough to keep me from moving my entire library to Aperture, and hopefully some of those features will end up being inherited in an update someday.
I would love to hear everyones thoughts on this but understand if this thread has lost it's appeal. Thank you again for the previous responses.