what type of athlon xp did u get? is it an xp 3000+? anyways if u want to game and do animation creation then suggest a good asus bord but that will go for about 60-75 so if you want cheaper chaintech motherboards to me are cheap but good. this one comes with the nvidia nforce 2 ultra 400 for only 50 the nvidia chipsets are good for gaming so i think you will like this one. the newest nvidia chipset is the nvidia nforce 4, but those cost alot more so the nforce 3 should be good for you. the mobo comes with 3 ddr slots it is compatible with pc3200 ram and it is dual channel ram supported. it is good but if if u want better quality then go with asus the cheapest asus is 60 at newegg.com.
so if you have anymore questions just ask me also i dont know if it will fit in your case but i gaurantee that you will need to buy a new power supply because if it is the one it came with then it probaly wont be enough watts for your new comp so if you are going to buy a new psu then you minus well get a new case that comes with a psu, unless you just want the psu and the old case but what form factor is your case micro atx,mid tower fulltower?
New build in progress, but this is what I got for now:
-AMD x2 5200+
-Asus M3A78-EM AM2+
-Buffalo 2x1gb ddr2 800
-Hitachi 250gb Sata HDD
-Antec Minuet Case w/ 350w psu
-Windows 7 Home Premium 64 bit