As a beginner I quilted (SID) on a 60x75 with no problems. I took my time, and made sure the quilt was nicely supported to keep it from dragging while sewing. The quilt I did was for the family room and has been washed at least 20 times so far and all is well. I think as long as you can keep the weight of the quilt supported, you will do just fine.
I love both your patterns and am currently working on the lattice quilt myself. Good luck.