Infinity Reference series of speakers are a different animal (well most of them), and yes it's easy to dismiss 35 year old speakers if you've never owned them.
I am just about finished updating my Infinity RS Kappa 7s, after having the woofers re-foamed, Polydomes repaired, new GR-Research crossover, and am just finishing off the internal wiring. Can't wait to get them back into the mix