Those will be solid, and work very well. If you were building one for yourself I would suggest something a little higher end that you can overclock, but from what I understand that is not the purpose.
Thank you for your reply, yes it is for business, It currently is an operating cafe. I need approximately 100 upgrades but cannot afford all at once. The current systems do not have enough memory. The difference in price of DDR2 and DDR 3 would pay for a new MB. Then it is only the CPU, I suppose.