Someone was looking for that amp model recently so I dug our 6505+ out and was surprised at how nice that channel sounds. I then spent the day modeling it.
I remember reading an interview that Guitar World did with Jimmy Page when the Coverdale/Page album came out in the mid-90's. As I recall most of that album was done using the Rhythm channel of the 5150 in crunch mode. That was the first time that I knew of a professional artist other than Eddie using a 5150. I got one about a year and a half later and have had one consistently since. I always really dug the crunch mode, I always wished the amp had a real clean channel to compliment those 2. I know the 6505 is a little different but Peavey claims it to be the same amp.