Trying to pick a new DSLR

[mjsmith55]

I currently have a Canon G7 (point and shoot) 10 mp, and it does a reasonable/good job with basics.

I'm looking to upgrade for;

1) expecting MUCH better overall image quality
2) ability to shoot action/sports (mostly baseball)
3) better shots indoors and or with low light

I have already realized that I;

A) do want 2 good/very good lenses that will last up to 10 years, and that the body will become sub-optimal quickly (2, 3 years)
B) do not need/want video capability
c) there is a steep learning curve with these cameras

To start I'm thinking of a Nikon D300, or a Canon 50D or 40D. The first two are certainly excellent/top notch cameras. But I'm also thinking that they might be over my head or just give me marginal image quality over the 40D.

Any thoughts would be appreciated

[DarkPenguin]

Any of the above would be fine.  Pick a price point and go.

I still think the D90 would be your best bet.  The video function does not compromise the non video portion of the camera.

[Plekto]

The smaller Olympus models also are nice choices.  There's a lot to be said for light and small.