Hi guys, i'm gonna upgrade to an EM soon and i have a couple of questions in mind. Being old flats, do EMs have any problems of hollow floor, thus resulting in noise transcending from the upper household? Does any EM owners here encounter noise problem from above? i'm gonna spend a huge sum of money upgrading and it's prolly the most impt decision i've made till date, and i just wanna make sure the decision is a wise one =)