I just bought the Event Alps5 for a friend, they do not have as much as subbass as the Z5500, but lets be real, that logitech ain't the closest thing to a neutral sounding speaker system.
Yes it does have a lotta connectivity options and a overpowered subbass which drowns out a lot and what you can not hear, and what you cannot hear, you will never know.
The Event Alp5 has a very detailed, neutral, fuller sounding sound experience. Being bi-amped active monitors means I don't have to use a receiver or an amp to drive them, and they are extremely loud even when driven from my iPhone. But thats the case with most active monitors. So if music/movies is your first requirement, active monitors rather than logitech's speakers is what i'd recommend.