7DSV is designed for studios... where it's useful to lock the settings so the minimum wage employee pressing the shutter button when the kiddies grin can't make unwanted changes, and where image tracking with barcodes are useful...
If wireless file transfer is really of interest to you, all you need is the appropriate WFT (5A?) added to a standard 7D. It's about an $800 accessory.
7D too pricey? Aside from video and wireless flash, the 50D you already have can do 90-95% of what 7D can do, and cost quite a few dollars less. And, there's a possibility we'll see a 60D soon, which will no doubt have video capability stuffed into it. For a lot of people, a 50D (or still mythical 60D) would be a much better choice, anyway. 7D comes with a pretty steep learning curve and you'll be paying for quite a few bells and whistles I'd be you'll try once while reading the manual and never use again. As a 1D series user, OP will probably have less trouble ramping up with 7D, than would someone coming from any of the xxxD or xxD models.