Down the road after I save up another 600 or so I'd like to pick up an Phenom ii x6, 1090T, and an ATI 5850 or whatever is just below top dog by then, also drop in a 32gb SSD and just use the Pata drive for backup duty. In the meantime I'd use onboard graphics and my existing DVD and hardrive to save cash. I also use Ubuntu as my OS and I primarily web browse and stream/convert music.
The total cost is lower as compared to the individual components as selected by you (motherboard and CPU).. You can put the extra money in getting a video card as the motherboard lacks on-board graphics.. I'd suggest these -