i too am in 2 minds about either the westone w40 and SD-3. i like big bass, but i dont like it if i play it loud and it distorts and ruins the mids. ue900 does this at real high volume. i want nice big bass but clean mids and nice highs also are the SD-3 the ones to get? w40 seems to be getting nothing but good said about them really but im getting the feeling ill enjoy the SD-3 better. oh and i need them to isolate good. ive had lots of in ear monitors, shures, UE, westone, the lot and cut down big time recently now i just need one set to get my by with great sound, its the w40 or SD-3 what should i get?