Bike looks neat with that tank on...
28 litre tank is quite large, I am sure you guys will be just fine.
May I ask what is your height and weight? And do your feet touch the ground flat on both sides?
I sat on a DRZ once. I am quite a tall guy and compared to my XR I didn't quite like the lower riding position of the Suzuki...
Just my opinion, nothing against the bike.
Two wheels good, one wheel better.
'92 Honda XR600R