Upgrade question.

Knowing that Quad and Wharfedale are speaker companies that are under the same distributing umbrella, I have a question directed to owners of one or the other brand. I am currently looking to upgrade from my Signet SL280EX and would like to get some advice as to which brand sounds better. I am leaning towards either the Quad 21Ls or the Wharfedale EVOlution 30. They both use Kevlar mid/bass drivers, although the Wharfedale use 2 and the Quad only one. Both has a bottom end spec of 35hz and 24 khz.If there is anyone who have heard these speakers and can provide some useful advice, I would welcome and appreciate it. Feel free to suggest others; however, these two are at the top of my short list.