Multiple burner tower



I would like someone to suggest to me An online store where I can get a very good cd/DVD multiple writing tower . preferably with 7 burners. I like pio A07 but if there is a better burner to go with a tower then please write. I run a business that reproduce Data ,Video , and Audio files . There are so many machines out there I dont have any Idea which would be best for me. I also would like one that can standalone or run with PC. Maybe about $1,600 to spend. Thanks