@mountainsong the 1.5 meter distance from the side walls is OPTIMAL so you will get the most out of these speakers. Too many people make the mistake of putting these speakers too close to the side walls. After more than 50 hours of testing speaker positions, mine are 4 feet from the side walls and 4.5 feet from the back walls. While these speakers are quite sensitive to placement, the good news is that they are relatively light as compared to other speakers in their price and performance range so they are easy to more around. I chose not to use the spikes and used Stillpoints on mine. If you can arrange for an in-home trial, that would be optimal, but based on what I know about your taste in music and equipment, I am sure you will be very happy with the Blade 2s. I really haven’t heard anything that sounds better at that price point (over even $10,000 more). The Blade 2s have me now engaged with the music as opposed to kicking in the OCD thoughts regarding "how can I get better sound"!
Keep us posted.
Keep us posted.