Best used preamp processor


Hi, I want to know what is the best option for a used preamp processor
under $600? many Options I have are:
sunfire theater grand ii
proceed avp-s or avp
rotel rsp 1068
outlaw 990
yamaha dsp A-1
integra Dtc 9.4
theta Casanova
ead, I want to know the best for theater and music.Please help me to choose.
incognito7
Incognito7 wrote, again: "Hi, I want to know what is the best option for a used preamp processor under $600?"

Player? Display? HDMI?
Hi, I want to know what is the best option for a used preamp processor under $600?"I dont need hdmi.and dont need balance output,the player is a sony dvd blueray and a modified toshiba dvd.
If you are not using HDMI for audio, you will need a prepro that can do bass/channel management with the analog inputs. Not the way I would go but.....................

Kal