with a 101db sensitivity, he shouldn't need much power to drive those speakers
Agree for the most most part 101db is extremely efficient.... unless the woofers are not contributing much to the measurement they used when they specified the sensitivity measurement at 1watt as is common with horn speakers . I'm thinking the measurements they achieved were heavily weighted to or a result of the Tractrix® Horn .
That and the choice of LF drivers might explain Klipsch recommending much higher wattage amp as minimum spec. I was surprised to see that
considering the sensitivity spec. ofc one might need to attenuate the higher frequencies if that is the case when using higher power amp at higher levels . Bi amp is another option Klipsch has them strapped for that .
With the RF7II being a ported design rather than a folded horn like K horns or La Scalas the low end usually will not be as efficient on the ported design as the old schools .
I would also expect that most who buy those won't be driving those (or shouldn't be driving those ) with low end AVR's .
I have some speakers rated at 150-450 wpc . The 375 wpc amp sounds better at reference levels than a 100wpc AVR on those
but those are 87 db. @1w1m speakers so that is expected.
Otoh if they were K horns or La Scalas you get away with 100wpc easy even half of that or maybe less. some folks drive those with
S.E triode's wouldn't be my choice but if it works for them more power to them .
A Crown pro amp maybe an XLS 2000/ 2500
would work well with those RF7II's IMO. If the OP listens at reference levels or more ! Then if he has a big sub that's another reason to feed these the recommended power. Just my opinion FWIW.