To me it would depend on what type of sewing you do in your sit & sew group on a regular basis. If it's strictly straight stitch piecing then I would definitely go with the FW.
If you are looking for something to accommodate that plan as well as be a back-up machine with more utility, then you might want to go with the other machine.
As Sunflowerzz says, you can always sell the FW if it doesn't satisfy your needs - or keep it cuz they are really cute and do sew an amazing straight stitch!
I have a FW and love it's portability and reliability. I use it for classes and for personal travel. Have even used it for some mending tasks when I didn't want to rip something completely apart and I wanted to be able to fix it local to the item vs bringing the item to my main machine.