Ascend Sierra's or Energy Veritas 2.2i

I've been deciding on a good pair of bookshell speakers. The Ascend Sierras have stellar reviews and was set to buy them but ran across the Energy Veritas 2.2i for a great price at about $900 (about half price). I couldn't find any professional reviews on the Energy's however.

I also have a concern on the power requirments for the Energys though the specs don't seem to bad. I have Cayin 88T tube amp rated at 22W or 45W depending on mode.