I had a 24", but I moved up to the 44".
Here's one good reason why: With canvas, figure you need three inches of extra material top and bottom to do your gallery wrap and stapling. With 24" canvas, that means the face of your print can never be larger than 18" on the short side. For me, that's just too small for living-room or gallery-size art. With the 44" printer using 42" canvas (the most common size), you can get 36" on the short side of your print. That means an uncropped image from my camera can measure up to 36" x 54". Now, we're talking! (I do print on that extra three inches of canvas, it becomes the edge of the gallery wrap.) Oh yeah, my 44" Z3100 has taken up residence in the living room.