G'day Robb, welcome to the forum

I would suggest getting a ST1300

The electric screen means you can adjust how much air flow you receive

Or as a few of the guys have done, even more airflow can be had by getting a second screen and having it cut down for use in the hotter months

this will work for either the 1300 or 1100

Good luck with the hunt for your new ST

Cheers
Shiney