For a 27' pole you'll need an 8m coil (26' 3") and then add 1m extra hose to your order and put in the notes "to be supplied as one 9m length" (or similar).
The red is recommended for hot systems, and we would also recommend for longer poles as it's a little stiffer and lower stretch.
You can use the orange for hot, but it's a good idea to use a tube strengthener then do that it doesn't soften and collapse in the push-fit.
I'll email you this evening or in the morning.
Paul