If your going to build your own computer get everything OEM. Thats how you save TONS! If you can see if you can find one of the IT expos where they sell computer parts for next to nothing.
Anyways Your going to need a Tower depending on everything your going to throw in it you might need a mid tower or possibly a bigger one which can hold more power. As for the power I have no idea its been a while since i built a comp so anything that comes in a mid tower size should be more than fine. 300 w im thinking tho
As for motherboard you want an Asus or an MSI check their websites for the latest and go to
www.tomshardware.com to check which is the best. Try and get a motherboard with which has a good chipset and enough expansion slots to upgrade your Ram (you want ddr 2gig max) and to be able to upgrade your cpu chip.
Next CPU your motherboard will ultimatly depend on the chip you get. You have a choice Pentium or AMD. Since your building it yourself go with AMD they are cheaper and just as fast and most are faster. Downside is they heat up fast so your going to need the best internal cooling fan you can find.
Hard drive size is your pick, dont go with a crappy make as you will regret it! Maxtor or Wester Digital make the best IMO, and dont go with anything lower than 7200 RPM. If you have the money go for one of the new even faster ones which are 10,000 RPM+
Lite On DVD Rom - Why do you need a dvd rom? Do you watch dvds in your computer? Useless pos if you want get a cdburner so you dont wear out your dvd burner when you burn music cds and the such. Your dvd burner can do anything a dvd rom can do so dont waste the cash.
Cendyne is fairly hard to find, so you can go with a OEM pioneer a05 which are only around 150$ US.
Next Ram - Minimum 256 (I have 1 gig and love it) but remember you can upgrade to 2 gigs of ram if need be with the above motherboard. Get DDR PC2700 minimum good fast ram
Cooling Fan - ThermalTake Volcano 9 this is a nice fan
Sound Card - your choice.
Anyways thats what your gona need for a sweet home built comp.
Hope I helped