I'm not a fan of poly pipe and never will be. That being said, if you do decide to use it, make sure you use at least 160 or 200 psi rated pipe, not 100 psi. I suspect that 100 psi being the standard here has a lot to do with my hatred of the stuff. If you do decide to use 100 psi, make sure you keep plenty of sharp shovels and digging tools handy because you will be doing plenty of repair work on a 1100 ft line. I think if you look hard enough you can find it in 500' or greater rolls which will reduce the connections.
I have not looked at the specs so I'm not sure what the head loss would be on an 1100' run, but I would at least go with 1.25" or 1.5" pipe, depending on your flow requirements. Be sure to make your ditch as straight as possible and I would try to backfill with sand or such if at all possible.