I also have a steel rack with thick glass shelves and for me, the MIGs killed the Stillpoints. It wasn't even close. More open, fuller sound from top to bottom. In my system, the Stillpoints opened up the highs and upper mids, but didn't touch the lows or lower mids, at least not to the extent of the MIGs. I use the MIGs under all my digital gear as well as the control unit of my preamp. If I had to quantify, in my system out of a possible 10, the order of effectiveness has been: MIGs- 9; Cerapucs- 7; Stillpoints- 5.