I would buy the Rogers because it's a legendary speaker and soemwhat rare nowadays (whereas the Quad is more "run of the mill"), because it has an excellent design concept behind it (high system Q, conceived to operate even in small spaces...), because it has a "friendly" sound with attention paid to the critical mid-range, many hobbyists have it so there's support and a small community that exchanges ideas on how to get the best out of an LS3/5A
But hardly because it is the best (sounding) speaker ever made -- by any stretch of the imagination. IMHO, ofcourse.