Aerodynamics are better on an fjr than the harley type bikes. Combined braking with ABS is far better than no ABS and no combined braking, making the fjr or similiar bike much safer. Smooth inline powerful 4 cylinder. Hands down this is my favorite long haul bike over my two others, 1300 v-star yamaha and m50 suzuki, both v-twins, harley types.
My only advise would be to get a passenger backrest or the topcase. Many women (including my wife) hate to ride on the back of a bike without that backrest. They feel like they can slide off the back or side because there is nothing to give them front/back or side to side support. I got the backrest from pirates lair ($350). Pricy, great quality and comfortable and easily detachable when not needed. Wife loves it and she actually likes the hand grips for the passenger on the bike. Your sweetie will probably incremently come around to liking the fjr with time.