OK, let's focus the discussion here: even if there's a difference in sound, and even if that difference in sound is clearly audible, the OP clearly said he was looking for "good, quality speaker stands that don't cost a fortune." So, taking that consideration into mind, get the cinderblocks if you're only looking for small increases in height, or you don't mind stacking them. They look ugly, but if you spraypaint them black and turn them sideways, they can look pretty decent, especially considering that they're cinderblocks (I did a similar setup with my TV, and with the right paint choice they look pretty good). Also, to address your question furball, the daytom 24 inch stands are really nice ones. Very heavy and solid so they won't slide around if you feel in a megadeth mood someday. Also, 24 inches should be fine - if you're in doubt, grab some tape measure or a yardstick, mark off 24 inches, and go to where you'll be listening most of the time, staring at the mark - if it's approximately eye level, you're good to go.