I know this is an old post but I need to resurrect it instead of posting a new one. I have some 20 some year old Mirage MS 5 si speakers. If you are familiar with them great because I would like to get a new pair of front speakers. I have a chance to get some Mirage OMD-15 for a great price. If you know anything about the old MS 5s would it be an upgrade or not? Thanks.