You don't think the 805 is reliable PeterBateman, or are you just sick of seeing it on the forum? I haven't read many bad reviews for it on any site.
The Pentium D 805 overclocks well, but it performs poorly at stock speed. This is mainly because of the 533MHz FSB, which leaves the CPU bandwidth-starved. Also, because it's a 90nm process, it runs hot at stock speeds; very hot when overclocked.
If you're not going to overclock, a better choice of CPU would be the
Pentium D 915, which is a 65nm process with the 800MHz FSB. It would overclock better than the 805, to boot. It's $148 at newegg, versus $97 for the 805D.
Or you could, as other people have suggested, go with a Core 2 Duo setup. It would cost more for the CPU and motherboard (if I'm not mistaken, C2D only works on a board with the 965/975 chipset), but you'd have overall much higher performance.
You could always look into the socket AM2 Athlon 64s and X2s. AMD dropped their prices a lot recently, meaning that you can pick up an
Athlon 64 3200+ for $86, or an
Athlon 64 X2 3800+ for $153.
As for the video card: You mentioned that the computer won't be used for very many games. In that case, stick with a cheap, low end card like the 7300GT or X1300Pro. If you want more graphics power, then get a 7600GT.
One final thought: Your needs aren't very high, and AMD CPUs are very cheap. You might want to reduce your overall budget to something like $600; you'll still get a system that will fulfill all your needs.
-FF