Longwatcher wrote:
((Camera / Money) - Time) * Desire = purchase
Interesting.
What values in what units do you fill in in that formula?
I have a 10D now and I'm still feeling that my desire parameter is very high for the 5D...
It seems so much better than my 10D: full frame, twice as many pixels, better AF system (faster, better low light performance, more accurate), less noise, spot meter, ISO in 1/3 stop steps, better viewfinder, better and larger LCD, RGB histogram, faster startup time and CF write speed, etc... But is all that worth twice the amount of money I paid for my 10D?
My plan until now is to save money the coming months and I hope that early next year the 5D will be a few hundred euros cheaper. There are some places here that already are offering it for 3000 euros (instead of 3300 - 3400). Maybe if it's down to around 2500 - 2700 in the beginning of next year...
The last few days I've sold some photography stuff I didn't use anymore (EOS 30, film scanner, 420 EX and ST-E2), but it's still a long way before I have the money for the 5D... 
And if I have the 5D, I'll also need more CF cards and I'll want a faster computer to handle those big RAW files... 