i would scrap the mobo ram cpu selection and get a good mobo to start with. i've heard the gigabyte 965P is nice (177$ via elive). get yourself a low end processor such as a pentium D or pentium 4? (i'm a noob too)
for gaming i've heard AMD is good, but if you want to upgrade to a C2D you'll need an intel mobo. all intel's use the 775 slot anyway so you're covered regardless- just make sure it's compatable
i think if you've got a DVD writer you don't need a DVD reader....
use a tiny hard drive and copy data to discs until you can afford to upgrade....
i didn't see a ram description, but kingston is good. 1 gigabyte of g.skill is 97 and people always recommend it (i got corsair ballistix)
i've never heard of Atrix. my only advice is get something reliable. Thermaltake, Enermax, Antec, etc... if your power supply is crap the whole system is for naught
the video card sounds nice, but expensive for what it's offering
PCI-E XFX 7600 GS 256 Mb is listed at 180...
plan for the future buddy
an 8800 series card... a core 2 duo cpu.... more ram... a larger hard drive... a reliable power supply and a good case for all of it