I looked at the nad t-743 and the pioneer elite vsx 54tx... both were very nice and had great sound. I ended up going with a denon avr 2805 for the inputs (the only reason)

not being familar with your speakers, but hearing they are 4ohm, the nad would probably be the better option, although I am told the pioneer elite can do 4ohm...

you said the 2 receivers are the same weight, well the pioneer elite has one additional amp channel so just looking at this, the nad seems to have a beefier power supply...

if there is any doubt, get a nice amp for these speakers