Looking at upgrading current speakers

I am currently using Mirage 3si for my main spekaers in my two channel system. I have upgraded to a Sonic Frontiers Line 3 preamp, Processor 3 and SFT-1 with I2SE connection. I am using an Aragon 8008BB to drive everything. I like the Mirages but am looking for more depth, clarity, transparency and all around tonal balance. The Mirages have the bass that I like but I am looking for a little more. I have Auditioned the Silverline Sonatina II and Magnepan 3.6. They sound very good through the midrange and upper registers but the bass was not there. I have seen ads for Silverline Sonata III, Meadowlark Blue Heron, Genesis V and Von Schweikert 5 HSE. I have heard great things about these speakers but have not heard them. I am looking to spend around $4.5k. I'm soliciting any and all opinions on these and any other speakers you think would give me what I am looking for at the price I am willing to pay.