As nice as the 5's look, IMO the 23's are right there with them. I sometimes prefer the 23's over the 5's, just depends what I'm listening to. I've been playing Phase Techs along with 2 subs for the last few weeks but I think I still prefer the 5's and 23's (no subs needed).
Getting back on topic I pulled my 5's out this afternoon and AB'd them between my Onkyo A-10 (85w/ch) and SX-850 (65w/ch). Gotta say they sound more "pure" at the same volume levels running on the Onkyo. The Onkyo is a beast of an amp, dual mono design. I'm betting those watts ratings were somewhat conservative.The 5's find a new gear with some nice power behind them.