From the Onkyo TX-SR602 site, "The TX-SR602—the latest in a line of Onkyo’s constantly evolving home theater receivers—has joined the big league. With an extra channel—now seven hardworking full-bandwidth channels in all..."
I have this reciever connected to Klipsch RF-15 speakers, DVD player, Xbox, TV, Digital Cable box. It works really well. The sounds is crisp and undistorted until higher- then-comfortable listening levels. The speakers are efficent and take little power to push to adaquate listening levels. The noise-floor is high enough to be a non-factor (85% volume).
I would have purchased the 702 because of the pre-outs if I had known of there importance! Would you be interested in a 602 that was used for 2 months?
My 2 cents, I would have gotten the pre-outs because I'm going to get louder speakers some day. If you don't intend to get speakers that can roll your scalp back then don't worry about pre-outs.