I bought the XL t*utto for my machine so they will fit in through the top. I didn't want to load from the front of bag down on the floor. It's easier to drop down from top. Check your machine measurements and compare the "B" brand tote so you have a reference for size needed.
I still need a larger bag for the D*ream machine as it only fits in from a front load point. The other factor is that I can't load bag and machine into my truck as it's too heavy. The bag is used in sewing room to store my machine.
Make sure the bag can fit into your vehicle easily.
Here is a size chart for reference. There is usually a couple of sales each year for them.
http://store.tutto.com/machine-size-chart/