need to decide on a socket 370 board

[sithlink]

im going to build a friend a computer but im having trouble deciding which motherboard to choose. i plan on using a celeron 800-900mhz cpu cause it seems like the socket A boards are often more expensive than the socket 370 boards. im looking for something that is inexpensive and reliable...(don't really need the nitty gritty features. im not going to overclock and im not going to use a dozen pci slots. im trying to keep the cost as low as posible). i might even consider a board with integrated sound and video because price is the main issue.

i was thinking about the following boards:

Asus CUV4X
QDI 10T 4x 133
Asus CUSI-FX
Asus TUV4XC
ECS P6S5AT <---- i never heard of this one
Asus TUSI-M
ECS P6VXAT <---- never heard of this one either
Houston 758
MSI 6390
ECS P61EAT
Abit VH6T
Asus CUVL-VM



im pretty sure a lot of these are micro-ATX format...does that make a difference? can i put a micro ATX board in a mid tower?

any comments or suggestions would be much appreciated.
thx!