Home works just as well as Pro, 95% of the new machines that leave my shop for clients uses it, most users don't need the extra features that Pro offers. They both need some "tweaking" to get as responsive as my tastes prefer, but after that I just love them to death, definitely the best product M$ has ever put out.
Home works fine in a home networking enviornment also, so unless you have dual processors, want some better file encrypting options, or need more advanced networking abilities than home offers, I'd say save the $40 and get Home if money's tight.