i'm biased but i'd recommend the 4100.
even though the 360lx has as many good features as the 4100, the keyboard is too incomfortable for me on the 360lx/mc16. so that is my bias, the usability of the keyboard. also the 4100 is faster.... but you must love that white backlight on the 360lx/mc16... & dual slots. but i think i already listed these advantages / disadvantages recently lol