Hi Georg, yes, the bigger foils are not nearly as much fun due to the span - but for downwinding/pumpfoiling, there is no way around that. Actually I would say the 1595 has far more lift/pump than the Free 2000, due to the Aspect ratio.
For downwinding/pumpfoiling, with 85kg, I would really go for the 1595. If you want to combine it with light wind winging which you probably will be doing more of, then the 1305, this will work for downwinding in stronger winds and with some practise pump foiling - some of our riders pump from the dock with a Glide 905 or even smaller, but they are obviously very skilled.