I really ought to have a go at summat like this for myself - lazy git I am....... The LS5/9's are very "organic and smoothly coloured," but a desktop really needs something a bit more "direct" sounding I think. If the port makes the sound too "porty" thus mounted, rather than on stands, I'd probably suggest a Wilko bath sponge cut in two on standby

Good luck and hope the sound suits - should I reckon...