Dslr Cameras

I Am A 15 Year Old Amateur Want-to-be Photographer. After 3 Years Of Using Point-and-click Cameras To Take Photographs, And After Several Months Of Consideration And Days Of Research, I've Decided I Want A DSLR Camera.

Money Is One Factor, Of Course, But I Don't Want To Sacrifice Too Much Quality For It. Definitly Looking Under $900, Though. Some Things I Definitely Want, Prioritized From Most Important To Not As Important, Include:

Good Color (!)
Low Noise At High ISO Settings (!)
High Image Quality (!)
Image Stabilization (!)
High Maximum Shutter Speed
Fast Autofocus
Large Buffer
Quick Startup Time

I've Already Researched A Few Cameras, Including:
Canon XTi (pretty Good For The Price)
Olympus E-510 (wasn't Really Impressed)
Sony DSLR-A100 (this Was Okay)
Canon EOS 40D (really Impressed, But Pretty Expensive)

Basically, What Are The Best DSLR Cameras With The Most Features- For The Price?
BTW: I'm Not Interested In Becoming PRO Soon, I Just Want A Great Camera To Capture Life's Arts (: