I use the Gardiner green too , I basically have 2 ways to set up , due to your reasons with it liking a bit of warmth , I dont get the kinking at all but its more of a not laying as flat as I would like it to issue .
1. Summer set up , 85m green , very slight coiling at times if not over 10c ambient temp .
2. Winter set up , 65m micro onto 20m green , micro only used here as the green does not retain heat in water so well , via L5 .
The only other things that i think come close to what you are after are Exceed blue and Rhino , but i have heard good and bad reports on both , so really , other than knowing a person with these that you can have a look at , its going to be a case of buy and try , which I dont think is a very cheap way to find out !