Hi Mel

My first recommendation is to demo if you can ( might be hard in that size)
Most of the small kites are designed for 75kg riders in strong wind and most of the tests are done by people of that sort of mass in 35+ knot's, The flying experience might be quite different for someone of your mass in your intended wind range.

Stick with the dice they are a great kite
Don't bother with SLS in your high wind kite. You won't really notice the advantage of the lighter weight and you might be able to get a newer kite in standard construction for the same price

A 3 meter size difference in kites is quite large. I am similar to you. I like fast small kites and in WA At 80ish kilos I run a quiver of a 10 and a 8 that covers me from about 15 to 40 knots

If your in WA call in to Action Sports WA and speak to Darren or one of the girls there they will be able to give you a better idea of how the kites fly for someone of your size.

If you want to try something different to anything else on the market Try a Core Nexus my current favourite kite

Have fun with the process of buying a new kite