Re: Worth it?
For having someone else custom build it for you the price isn't too bad there. As for having a high end gaming build then you have to look at a few things like a faster cpu to start with.
DDR2 800 memory on a board that will run that will see a good pair of performance dimms work. Depending on which version of Windows you will be running 2gb is generally adequate unless running CAD while some will add a 3rd 1gb in for Vista if running a 32bit edition of Windows.
Video card, optical and hard drive(good sized helps), and power supply look adequate there as well. For the case itself that's preference as long as you are seeing good air flow and have some room left for later expansion.