If this a good computer i am build and will it work?

Overall, looks like a sweet setup to me. You did forget to budget for a cpu/heatsink cooling embly, unless the AMD Phenom comes with a stock cpu cooler. Later on, you might want to consider buying a 1 teribyte drive. But right now, you didn't do bad at all! Good for you! Ask whoever at Tiger just to confirm you get a stock cpu fan/heatsink embly with the processor, ok?