I am looking at putting together my first rig. I have been leaning towards picking up a Peavey Mark series amp. It seems that the III's and IV's come most highly reccomended. All of them seem to be relatively easy to find for under 200 dollars, reliable, and servicable for many years to come. While I am looking for used amp what other brands beside Peavey come highly reccomended in their older used state. What I should I look for. Also which Peavey from the Mark series is best? Thanks.