brought1, I think you're understating the differences from 50D to 7D. Considered individually they might not be massive enough on their own, but lots of small improvements do add up. The differences are not something "you can usually adjust in Post".
After spending time shooting with both cameras, I do agree that the 7D is a mighty fine speciman, however, from a practical standpoint, I'm sorry, you can equally get beautiful results from either camera. And yes, eventually small improvements will make a difference, but not in this scenario. Unless you have an endless budget or absolutely must have high end gear, you'll learn that you purchase the gear you need/must in order to give you an edge or to stay current. Comparing these two to someone who already has a 50D is a moot point, andthey've probably have in an order for a full frame camera already. And in that case, they should be looking to upgrade their lenses.
And about the "post-editing," if you wouldn't mind sharing what cannot be achieved in post. In all honesty, I try as best as I can to nail each and every exposure every time so I don't have to futz with post production, however, let's be practical, I have several weddings coming up and one just happens to be in a catholic church...poor lighting, no flash allowed, high ISO is expected. I would take a 7D over a 50D any day for that application, however, because I know the circumstances, I won't even bother with a 7d and jump straight to my 5D mk2 with my primes to offset noise and to get down to 1.2 or to extreme measures, my 50mm 1.0 to really avoid noise...but even with those components, you're still going to make small adjustments in post.
For all that read this, please know I'm not trying to be argumentative towards anyone, just being practical. If you already have a 50d and want to upgrade, you might be better off going full frame, but this depends on your NEEDS as a photographer. If full frame is out of the question, then save your $$ and get better glass. Quick example...how much would you really get back if you sold your 50d? Not too much, believe me...or don't...go to eBay and check used prices...you will be taking quite a hit selling your 50d and end up shelling out more for the 7d with nothing left for better lenses. These little accommodations on the 7d do NOT justify a complete need to switch bodies unless your after the video feature, which then, the 7d will work just fine.
For the original owner of this post, think of your purchases as if you run a business and have to justify your expenses instead of reading which camera has the best specs and you won't go wrong. One last point...GET WHAT YOU NEED TO BE CURRENT and WORK AT BEING A BETTER PHOTOGRAPHER...