@pholy: thanks a lot for the information and the pictures
. T-1 looks fitting quite well into the Gecko Luxe, and as everyone else said, it looks very nice.
After reading with my T-1 over the weekend, I found out that built-in light is essential to me because my eyes are bad. It is worth investing some money in a cover with light. Besides, I throw everything in my backpack, so a stylus holder would be helpful to find the stylus back easily. In the end, I gave up the idea to try out how T-1 fits into a real cover before buying and ordered the Gecko Luxe with built-in light online. I will post some pictures after I receive the cover.