Case, I'd stay away from thermaltake. I hate them.
Take a look at Antec's P180 or nine hundred series. Lian Li are awesome but pricey. Any case is good as long as you like the look.
The NEO power supply is a good choice. Modular, quality, and 5 year warranty.
The fatality board is overpriced, but Abit rules. Nice choice. Abit rules.
The CPU may need rethinking. Intel has them beat at the moment. An Intel Core Duo is a better choice.
RAM go for a 2GB dual channel kit DDR2 800. ANy brand is good, as long as you get a brand. Don't get OEM RAM. Get the cheapest stuff out there which may end up being an OCZ kit. OCZ is my favorite. Corsair is viewed as the best. If you want to spend a bit of extra money look at the timings on the RAM. The smaller the numbers the better. If money is an object get the cheapest name brand kit out there. It'll have stability and a lifetime warranty.
Video card, ATI is the winner now according to Tom's Hardware. But the newer DX10 NVidia 8800 series would be my choice if you want to spend the money on a top card.
For the hard drive stay away form Western Digital. Go seagate. Make sure its SATA II 3GB/S and make sure your motherboard supports SATA 2. the 300GB are a good deal now as well as the 400GB. Get 2 smaller drives as opposed to 1 larger drive. Its the same price plus you have 2. If one crashes you have the second to bail you out until the broken one gets replaced on warranty.
DVD-RW, get a SATA drive. Unfortunately Plextor is the only company making them. Fortunately they are top quality and slot load. GO for it, why clutter the case with an IDE cable. The companies are retarded enoough not to make SATA drive sin this day and age why support them, go Plextor.
No need for a CD-ROM or a floppy. You will never need a floppy, well probably never. If you do take a look at a Mitsumi with a built in card reader. Might be worth it if you'll get use form the card reader.
make sure you get an aftermarket cooler. Check frostytech.com for reviews. I love Zalman coolers, great cooling, quiet, good looking, and a great mounting mechanism to boot. They also release kits to upgrade current coolers to new CPUs. Make sure you get some Artic Silver 3 compund. Don't use the stock stuff shipped with the CPU or cooler.
that should do it. Just my recommendation based on 20 years of building and selling PCs and gaming rigs.