Logic express is diff from Logic studio pro 8 its like the difference between an Ableton lite (which comes free with every M-audio interface) with Ableton live 7... i'm currently using a Logic studio pro 8.. "what makes it so expensive" ? ok here's are some of the reason..
With logic pro, u received the the LOgic pro, Main stage, wave burner, sound studio and logic node.. it's a 5 in 1 kinda bundle.. with all that u don't have to fork out cash for any unnecessary plug ins or samples cos most of it is right inside there... what's important is that it's user Friendliness !!!.. unlike other DAW which may be a hassle to some.. so there u have it.
Any question bout logic or anything related feel free to ask.. thanks
Rayza