For both of our "big" girls (Sahara is about 115 right now and 31.5 at the shoulders) we use a 54 x 37 x 45. Its the biggest crate they make. The problem is, when you just from the 48 to the 54, the price just about doubles. I got my crate at cost from our local pet shop (it's sure is good to have a great relationship with them) and it was $250.00. For Sahara, it is just the right size. I had people try to get Skye into a 48" crate, but the height is just not right for danes. 54" is the best to go for a tall dog. Seems like you should be good with Harlee though Just thought I'd let you know which crates we have.