Impact of speaker stands?

OK, I recently acquired Kef R300 speakers to go along with my Ohm Walsh 2-100s. I presently have them sitting on top of 2 JBL L110s as my "stands" as the JBLS are not being used. The JBLs are 24 inches high...the same height as the stands I would need based on the KEF directions for placement. The JBLs sit on the wood floor on top of foam pads. The Kefs sit on foam pads on top of the JBLs. I have never had speakers on stands. The question is, what if any, benefit would I get from buying real stands? I think these would cost about $350 for good ones shipped to HI.