My spring mattress is plenty quiet. What can be obnoxiously loud is the stupid headboard squeaking. Sometimes it gets so annoying that during missionary I grab it as leverage, which hopefully keeps the volume down somewhat for the family living above me.
If you get a spring mattress, look for one with individually pocketed coils. They're much more comfortable than an old-school mattress, and supposedly last longer before the thing starts to sag.
If you get a spring mattress, look for one with individually pocketed coils. They're much more comfortable than an old-school mattress, and supposedly last longer before the thing starts to sag.