I am curious to know why you have been using the kenwood over the nad for the past few years. Was it a sound quality issue?

The 7140 was made a year before the 7240. IMHO the 7240 was a receiver I would not have bought due to its audio quality which left a lot to be desired. I do own the 3240 nad amplifier and it too does not do what a nad should do in sound quality. Now the 7140 could be great. Nad's quality control and consistency of sound quality is erratic IMHO. I had a 7220 PE receiver that was dynamite, But their next model, the 7225 felt like it had the power of a corpse. The 3240 int amp just did not have the balance and finesse of sound quality of the 7220 receiver.

What little kenwood pieces that I have owned over the years showed me consitent quality control maninly in their tuners. I never really played with their receivers. On their integrated amplifiers years back, I thought they produced squeaky and exaggerated high frequencies yet their overall sound was very well phased between the two channels, a kind of sound I only heard on some Fisher tube equipment.

I would keep the one that sounds the best.