As someone who ones both a Yamaha (RX-V2500) and an Onkyo (TX-SR602, currently in its box in my closet waiting for me to do something with it after the higher end Yamaha replaced it) I say, definately spend some time with both of them if you can. They (Yamaha and Onkyo) have very different priorities that different types of users will appreciate, to put it simply. Both brands are fans of custom DSP modes, so also listen to those if you'll use them (I don't often).