I used to think Spendor's stands were just plain stupid expensive.  Until I tried them.  I was using some typical sand filled square column B&W's before.  I had no idea how really good the little Spendors were until I tried these.  The difference was not subtle.  

There are many highly respected speaker manufacturers who absolutely do not recommend heavy metal stands or metal stands at all. Borresen makes their own stands out of mdf, unfortunately they are not available separately and if they were, the cost would be… too much to bear. Danish furniture is expensive anyway. 

Lots of good answer so forgive me adding one more. I had a set of these and they are very sturdy, easy to assemble. The one point - and forgive me if others have already pointed out - you can also experiment with inexpensive pads/material between the stand and your speaker. Happy listening! 

Pangea Audio LS300 All Steel Floor Bookshelf Speaker Stands Pair (36 Inch) $149.00 Amazon

https://www.amazon.com/gp/product/B01EVNE96C/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

I’ve been very happy with the Pangea 400 stands (same configuration as the Monoprice stands in the first response), filled with lead shot.  Weight is 150-175 lbs, plus speakers.  Bedded in Blue Tac, my Ascend Acoustics Sierra 2 EX has a bottom end like my Dynaudio Heritage Specials now.  

I use some RockVille I got on sale at Amazon for 69$ for 29" but they may be too high for my Harbeth 3.0's. Metal single post I filled with rock and later I weighed down base plate in place. No children on site so structurally it seems ok, must warn housekeeping tho. Sounds ok and frees up some real estate in my small place. Speaker stand station overall drives me crazy tho, the all look terrible and most of the good ones seem like they must be terribly over priced.