ok so he has a PC2700 right now.. and bought a PC3200 cuz he can afford it. now in the near future, he could buy another PC3200 stick and run them dual channel in DDR400 speeds.
If you tell him to get a PC2700 stick just so he can run both his sticks at the same speeds, then whats the point of upgrading? sure he gets that extra MB but the speed counts too