I've been considering these for a while, and I finally placed an order for the X6100 yesterday.
I haven't used shortwave radios before, and I was primarily considering the price. Currently, the G90N seems to have a higher resale value than the 6100, which could make it more cost-effective in the future if I need to upgrade or replace my equipment.
Ultimately, I chose the 6100 because I thought it looked better and was more portable. Two years later, if I hadn't been able to get rid of the fever, I would have bought a base station like the 7300, and gradually upgraded to a larger radio. If I had been able to get rid of the fever, I would have used it as a regular radio.