Pentax K100 Super, all th ebenefits of the K10D, in a K100 body, with a K100 price. then get the pentax Kit, and a 2GB SD card.
Errr, not quite,
but the K100D is a nice camera. I use one (pre-Super) and would recommend it, but let's be honest, if you only look at one camera you are highly likely to be disappointed. Here is the process I would recommend:
1. Round up your options:
Everyone will recommend the system they use, but that doesn't make it any good for you. A little research will give you a nice list of cameras in that range. Let's start with the ones I considered:
Pentax K100D Super
Nikon D40
Canon Digital Rebel XT
Sony A100
Some sort of Olympus (could never get their numbers straight)
This is off the top of my head, there are more.
2. Compare/contrast
Every one of these has unique advantages and disadvantages. I used
http://www.dcresource.com to compare, but there are others. Realize there is not "best" camera, and determine what features are important to you- for example, if you really want image stabilization in-body, Pentax or Sony is a much better choice than Nikon. If arguing on the internet that your $600 camera is the best on Earth is priority number one, stick with Canon or Nikon. No one camera in this price range is perfect or abominable, they all have pros and cons. Learn about them and narrow the field.
3. Get some real
On paper, the Rebel XT seemed like a great camera, but once I held one I completely lost interest. It just felt awkward in my hands, whereas my Pentax seems like a natural extension of my hand. This is personal, but it's important. Don't order a camera on the internet based on your research without ever getting a feel for the shape, weight, shutter feel, and interface. In short, spend a little quality time at the camera store with your camera contenders. It is good practice to buy from the shop that spends two hours showing you various expensive pieces of equipment, but going back home and ordering one online won't kill you. It's not good for your photo-karma, but sometimes you just gotta do what you gotta do. Just make sure you buy from a reputable reseller- there are plenty of horror stories floating around.
Some would say you can't go wrong with an entry-level DSLR, but there are definitely varying degrees of right. Buying based on recommendations from other people will get you the right camera for them, but maybe not for you. This is a time-consuming process, but getting it right takes a little legwork on your part. Best of luck in your search and may you take many happy shots with whatever you purchase. Be sure to tell us what you buy.