I've always lusting over a 1D body.... something about it I just cannot explain. Canon, listen to me, don't change any curve on the body please. (I hate looking at S**y A9**)
Coming from 40D, some might say, it is a step down. 3" LCD to 2". Digic 3 to Digic 2... not to mention other features... sensor cleaning and bla..bla... but I won't turn back. The AF is unbelievable. My keeper rate is sky high now. I live in a wet tropical country. Last month, managed to do jungle trekking after overnight rain... I had a 17-40L mounted... got it a bit wet and of course some mud.... no worries... weather sealed. Guess can't feel that way with 40D and 17-55 IS... even though IQ is similar to 30D and 40D, the built and robustness are huge advantage. I shoot a lot of thing. Indoor, outdoor, sports, architecture, you name it... this thing will be with me for years to come. Now, if only I can get it to pair with 1Dsmk2. I already change all my lenses to weathersealed zoom L (17-40, 24-70, 70-200).
Cons: It is heavy... I've shot sport event with primarily 70-200 2.8L. My muscle under my armpit sore for a day or two... but hey, it was worth it... >90% keeper of over 800 shots. Every now and then, I borrow my friends 30D with 50mm 1.4 mounted and miss the portablity... but once I look back at my 1D with 24-70, there is nothing like it... for the LCD, I'm still familiarizing myself with it... I envy my friends 50D screen but they envy my 1d body...