So far, I've seen no discussion of how extensively, or, in fact, how you intend to process the video information about which you focus this project.

By comparison with mid-range ARM CPU's, the fastest 805x's are pretty weak-kneed.

A couple of years back I worked with several SAMSUNG ARM7's operating in the 50-75 MIPS range and costing $7 or so in production quantity. These allowed you to attach directly to FLASH, SDRAM, and provided serial I/O on-chip, among other features including ETHERNET. Their evaluation boards cost about $250 and were complete with a LINUX OS and all the associated source code.

I also used an ARM9 at 166 MIPS for the same project, and found its eval kit cost about $200, again, complete with LINUX. Now these might not fit your application, but I'm quite persuaded that they'd work, though there might be variants that do the job somewhat better than others.

I'd suspect, however, that you might want to look at something really quick if these don't work out, and forget about processing video information with 8-bit MCU's until you have defined precisely what your requirements for the task will be.

RE