Hello everyone. Been browsing these forums for several months, but finally registered today. Anyways, I just switched from the DI to the DX as of yesterday. I had the DI since launch day. It's an awesome phone. Absolutely love it. I was coming from the "iphone" series. But since AT&T does not have 3G coverage in my area. I wanted to make a switch. I was going to get the Evo 4G for the screen size. But decided on the DI since Verizon coverage is good in our area. But I still longed for the screen size, so I switched to the DX. So for the OP (erjennin), here are my first impressions of the DI vs. DX. (Go to the end if you do not want to read it all, haha.)
The DI is way way better as far as the UI goes. Sense UI is much more user friendly, and seems to offer more compared to MotoBlur. Of course I've only had the DX for one day, but I switched to LauncherPro. It does make up for the lack of Sense UI. And I'm learning to like it a lot as I learn more about it (especially customizing it). But you cannot beat Sense UI (imo) for ease of use and features.
The screens. As you have heard, the DI colors just pop out at you indoors. But the DX is more accurate. In fact, the DX matches my color scheme on my computer monitor. I think I have read that the DX displays more colors than the DI? I cannot remember which article that was. DI blacks are much blacker than the DX. But the DX whites are much whiter than the DI. The DI white has a blueish hue. I never noticed it before on the DI until I had both phones side by side. Outdoors in direct sunlight, you cannot seen the screen on the DI, but you can make it out on the DX. In the shade or on a cloudy day, I would say they are about the same. With only one day with the DX, I have made less typing errors than I did with the DI. Maybe it's the screen size? Maybe it's the keyboard app? Maybe it's both?
Battery life? With only one day with the DX, I can tell the battery life is a lot better than the DI. If you get a DI, get an extended battery.
Signal/Reception? The DX is better. I work in a factory. Lots of machinery. In the break room, my DI would hop between 1 bar on 3G to 1X. Surfing the internet sucked (if I could surf at all). With the DX, 3 to 4 bars on 3G. Surfing the net was awesome. Phone calls? I rarely talk on the phone, but from what I could tell, the DX sounded clearer when being called at my computer desk by the same friend, than on my DI.
Other things to consider? Hmmm, personal preference, I like the DI better for the 4 capacitive buttons at the bottom. I'm trying to get used to the 4 "push" buttons on the DX. The speaker on the DI vs DX? I don't notice that the DI is better. But I'm still trying to figure out the ringer. DX is DLNA compatible. I do not think the DI has this. But I haven't tried hooking up my DX to my XBox 360 yet. I like the stock music player on the DI better than the DX. I like the camera setup on the DI better, but I like the camera button placement on the DX more. The camera sticks out on the back DI unless if you put a case on it to protect it.
If you want to see picture and video quality differences, go to AnandTech website and read their DX review. They have many pictures and videos of several phones posted in that article.
Sorry for the long post. But I think the DI is an awesome phone if you choose it. If you go from DX to DI, you will just be missing out on: the screen size, signal/reception, 720p video (for now, but doesn't mean it will be up to par when it does), DLNA, HDMI out, and battery life (stock vs stock). You would gain: smaller phone size (to suit you?), vibrant colors, Sense UI, and extended battery options (for now).
Hope this helps?