BFG is not know for making PSU but they have been doing it for about a year i think. They are Ok units but are a bit noisy and not very efficient. You might want to swap it out for something else, antecs are good, and my OCZ is holding up very nicely.
Hmm, I have heard of BFG power supplies, but after reading a few reviews they come back as an average-good power supply. You can do better. OCZ, or Enermax is what I recommend.
For such a awesome computer, why put it in such a misleading case? I would get the P180 if you like the look of the Solo.
Like shadowduck said, get a different videocard to save some money. 7900gs(199), 7900g(269)t, 7950gt(299), x1900xt 256(239), x1900xt(299) all come to mind, way better value.
DDR2 800 isn't needed for a conroe system, but you wont save much droping to DDR2 667.
The only advantage the Fatal1ty version of the X-Fi has is the x-ram, I believe. Wich does not give a noticeable difference in games. Save the 100$ and get the platinum (still comes with a break-out box)
Other then that, your system looks very solid. Nothing you picked isn't excellent hardware, but you can do better with a few components for your money.