lickety split

This is project that i have started,i have the ptz dome sony fcb eh 6300 hi def camera with sdi hd output,i have a few questions,what type fiber should i use?single or multi ,looking for a sdi hd transmitter and reciever with rs 485 ptz control and two sdi inputs,witch one should i use?the $400.00 or the $3000.00 one,will be using about 100'coax to transmitter at camera end,and 25' coax at monitor end.any ideas would be appreciated thanks Lee

new cctv camera project sony hi def camera 1500' fiber