Nice speakers! I users to own them years ago & the they like & need lots of power especially in a big room if you play them loudly which they are very capable of doing.
I don’t see many folks here mentioning this & I'm sure many won’t agree but whether you want to try to couple to or decouple your speakers from the floor really depends on the construction of the floor..If you have a very solid floor system like concrete slab on grade w/ ceramic tile or a very well made, very solid floor joist system ( unusual) , then coupling the speakers firmly w/ good quality spikes makes sense. If you have a more typical suspended floor w/ joists, plywood subfloor & wood or vinyl flooring on top ( over a basement or in the 2nd floor), then decoupling probably makes more sense to keep the floor from becoming one big resonating system which will likely muddy the bass & cause loss of detail, dynamics etc.