QUOTE (Saint Stryfe @ Oct 19 2009, 03:03 AM)

Now, I think I found the mobo (http://www.newegg.com/Product/Product.aspx?Item=N82E16813128358), but I must admit to knowing jack about Graphics Cards. I don't know how their numbering systems work, and if a 9400 is better then a 120T or anything else. I've been told nVidia is pretty much the default company now-a-days. Any suggestions? I think I'm looking in the 100$ range.
Like LogicalUser suggested, the nVidia 9800GT/GTX range is a pretty good ballpark to look at for graphic cards. I've been very happy with the performance of my 9800GTX+ (512MB).
I also haven't had much experience with ATI. From what I've glanced at, they seem a PITA to set up in SL, whereas my nVidia 9800GTX+ worked in SL without needing any added drivers or EFI strings. (Installing SL, it's actually the ONLY time I've noticed that I had full QE/CI and full resolution even during install!)
QUOTE
Also, for networking: I assume onboard network doesn't work often, so would a wireless card be in order?
Luckily there are many easy options. As said before, sometimes onboard Ethernet has problems with Bonjour and Time Machine, but it also seems to depend on the setup and if there's a proper driver. Using various guides for Leopard on the UD3P, I've set the board with fully-functional onboard Ethernet. But of course, as stated, a PCI gigabit card is also an option.
As for wireless- if you want and need wireless as opposed to a wired PCI gigabit card, you can go that route as well. For example, I've used
this wireless card with great results- full speed draft N works in OSX, and it's fairly cheap. It does require drivers however- some cards just show up and work as Airport cards, but not this one.
QUOTE
As I understand it, my processor, hard drive, memory, case, ect don't have any real impact in a build...
Well, OSX-compatibility, no, but performance, yes. Though just about any 775 processor will work, you definitely want to consider do you want, say, a cheap Dual Core Pentium, like the
E6300, or do you want a much beefier quad core, like say, the
Q9550.
There's some debate about RAM speed, but the price difference between say, DDR2 800 and DDR2 1066 is often so trival that one may as well go for the DDR2 1066.
This, for example, is a great match for any P35/P45 based board- I've used tons of it and love this RAM.
Hard drives- of course stick with SATA. Some people really swear by SSD drives for their OS. Also of course there's the amount of storage space you want/drive speed/cache amount to consider.
Also, consciously select your PSU. There's a lot of discussion on this forum about PSUs. It's a part that's often dismissed and overlooked, but is very important to system stability.
As a starting point, consider that Corsair seems to be very well-respected brand. Something like
this PSU would be great. 450W is actually plenty of power, no need to overkill. The 80-Plus efficiency doesn't hurt either.