Need a little advice here. I have 20 y.o. Rotel equipment doing double duty 2.0/5.0 (no sub). I'm happy w performance but time for the 21st century. Planning on keeping my 5.1 amp and upgrading to Rotel 1576mkii preamp w Atmos/Dirac. What to do about actually refitting? Front speakers are Meadowlark Heron and rear are Canton. How do I power or use Atmos or unforseen probs. These days I stream video or hireprops. audio 75% of the time. Thanks for the wisdom