Thanks packmule I googled the 1.5x crop factor and man did I learn a thing or two. I took AP Photography my first year of College as an electoral credit and it really hung with me. I finally decided to get a SLR over all the other cameras I've had. Boy did I jump in, I've had this camera roughly months and have collected or tried several different lenses. We have a camera store here that'll rent you lenses so it's been nice to rent different lenses and play with them.
I'm a novice and still experimenting with my camera. I think you need to find out what the highest ISO on your camera will still give you a good photo. Of course it depends on the size of photo you want too. You may find that ISO 1200 gives you a great 4X6 but not a 8X10. Using a higher ISO really helps when using a long telephoto lens. Especially when you are trying to photo a big buck laying under a tree in the shade or if you need a faster exposure in daylight. I'm still having fun with my camera trying to figure things out.
Here are a couple photos I took yesterday at my house. The woodpecker was drinking out of a knot hole way back in the shade of the limbs and leaves. I used ISO 400 at 1/60 and should gone even higher (experimenting). I used a tripod to get the shot. For the wild turkey chick out in the sunlight, I used ISO 800 at 1/2000 because he was moving around pecking the ground and I was hand holding the camera.