Don't toss out your old amp, your 86db speaks could end up as your back channels for HT. Give it a try and if it doesn't work for you then your are in the right place to get info for building some higher efficiency speakers. If this is your first tube amp you are also in for some great fun, as there is a great sport called tube rolling! Something that you can't do with SS is easily change out your transisters, but you can with tubes and yes there are usually small differences but sooner or later you find what works best with your system. Then you will know why we like this so much.
David Thatcher