Dont waste $150 on a Socket A based combo.
This motherboard has 5 eggs from 65 people at Newegg -
Gigabyte GA-K8U ATX AMD Motherboard
Or this motherboard, as it has PCI Express (one less egg though) -
TUL AX480A7-F ATX AMD Motherboard
And this is the 64-bit version of the processor you selected above -
AMD Athlon 64 2800+ 800MHz HT Socket 754 Processor
Combo #1 - $152
Combo #2 - $153 (not bad for a 64-bit, PCI Express based combo)
Both of these combos are going to be faster and more upgradable in the future than either combo that you had selected above.
Plus you'll be buying from a more reputable dealer than some random computer warehouse website.