ThomD said:
I'm surprised that people are recommending Canon's 20D (a 4 year old design) and 30D (2 years old). Yeah you can save a little money and buy a used one, but these are pieces of technology and a lot changes in 4 years. I'm not saying that aren't good, but they are not current.
Thom, you bring up a good point for discussion. This is a commonly held belief, created by company marketing.
The cameras are a little high-tech; but they don't do much more than expose a sensor to light, and convert it to a digital file. You can add a bigger display on the back, or add yet another White Balance setting, or some other Bell or Whistle, and it still just exposes a sensor to light. Some of the newer image processors are helpful; but are they worth the cost in dollars or in robustness?
Each person needs to determine what they need from a camera. If you are going to shoot in dim light most of the time, and need something with very low noise; then plan on spending big bucks on the latest Pro camera. If you are going to shoot Basketball games for Sports Illustrated, then plan on getting a Pro camera that shoots 6 to 10 frames per second. Maybe it needs to be weather tight. Etc, etc.......
What is it about an XTi that captures images better than a 20D or 30D? More Mega Pixels is not a good answer. The more MP they stuff onto the same size chip, the more difficult it is to creat a good quality image. Digital noise gets worse, halos get worse, color accuracy drops off, etc.. Don't fall for it.
(Again, this is just my opinion) The reason I have recommended the Canon 20D & 30D, and Nikon D70s (only 6 MP), D80 & D200, is: their technology is current enough, the MP is high enough, and they are built stout (unlike the XTi & D40x). The 20D, 30D & D200 are metal body cameras. The D70s & D80 are beefy plastic around a metal box core (similar, but stonger than the D40x).
To compare this to a vehicle, would be to prefer buying a used 80 or 100 series Toyota Land Cruiser, over a new Toyota Highlander with the latest bells & whistles. The Cruiser may not be the latest technology; but it is built better, and will still get the job done. After using it for a while, you may determine what you really need is a Unimog. Aren't you glad you didn't spend $28k on a Highlander? Re-sell the Cruiser, and get a Unimog.
After using the 30D for a year or two, you have determined that you need a 5D to meet your needs. Aren't you glad you didn't spend $800 on a new XTi, that is now only worth $200 to resell? OR, you find the 30D is easy to handle, gets the job done, and keeps on ticking.
If you have used SLR & DSLR cameras, and know the differences between the different options, controls and viewfinders; and you believe that an XTi or D40x is exactly what you need, then buy it, and an good lens. They will get the job done, and should last a long time, if cared for properly. But; if you are new to the SLR/DSLR world of photography, and you are trying to keep costs down, I recommend the tougher cameras, especially if it is going to be an expedition camera.