Fountain Pen Mike

I'm setting up a home theater system. My front pair of speakers are the Klipsch RF-3's. The RS-3's seem to be the "officially recommended" choice for rear speakers. I have an irrational bias against small speakers, as a result of my attitudes having been shaped in the old days when dinosaurs roamed the Earth and small speakers generally sucked. (And don't get me started on zoom lenses for my 35 SLR.) Consequently, I'd rather like to buy another pair of RF-3's, and use them as the rear pair of speakers. It occurs to me that nothing could match my front pair of RF-3's better than could a rear pair of RF-3's. Right? What, precisely, would be the the advantages and disadvantages of opting for another pair of RF-3's, instead of a pair of RS-3's? Assume that the price difference between these two speakers is irrelevant, and that I have sufficient space in my home theater room to accomodate the larger RF-3's without any problem. Thanks.