Welcome to the world of hi-fi. So glad that you were open minded enough to try a few things. As your resolution increases changes ate way easier to hear.
On the power side of things if you feel like it buy a furutech receptacle for your wall plug. That is huge as well
A free thing people will laugh at you but use a Google quality level and make sure your speakers are perfect and they are exactly the same height. Put a straight edge over the top of them and have the straight edge lined up on the two inside corners see if the outside corners are the same distance from the straight edge. If not make sure they are. You are making sure the toe in is correct. Make sure the speakers are solid to the floor as well.
Get that all done and as you get that done have a listen each time. If interested you can pm me and I can keep you busy for a month or two of free upgrades and you will be amazed at the end result.
Regards